diff --git a/Cargo.lock b/Cargo.lock
index f5d8213a..e4b57b13 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5,7 +5,7 @@ dependencies = [
  "bpf 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "bytes 0.4.0-dev (git+https://github.com/carllerche/bytes)",
  "clap 2.19.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "clippy 0.0.111 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.112 (registry+https://github.com/rust-lang/crates.io-index)",
  "clockpro-cache 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "coarsetime 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "dnstap 0.1.3 (git+https://github.com/jedisct1/rust-dnstap)",
@@ -21,7 +21,7 @@ dependencies = [
  "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "siphasher 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "socket-priority 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "socket-priority 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -74,6 +74,16 @@ dependencies = [
  "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "cargo_metadata"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "serde 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "cfg-if"
 version = "0.1.0"
@@ -96,21 +106,21 @@ dependencies = [
 
 [[package]]
 name = "clippy"
-version = "0.0.111"
+version = "0.0.112"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "clippy_lints 0.0.111 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cargo_metadata 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy_lints 0.0.112 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "clippy_lints"
-version = "0.0.111"
+version = "0.0.112"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "matches 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "quine-mc_cluskey 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex-syntax 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
  "semver 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-normalization 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -144,6 +154,11 @@ dependencies = [
  "protobuf 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "dtoa"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "env_logger"
 version = "0.4.0"
@@ -200,6 +215,11 @@ dependencies = [
  "unicode-normalization 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "itoa"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "jumphash"
 version = "0.1.3"
@@ -335,6 +355,11 @@ name = "nom"
 version = "1.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "num-traits"
+version = "0.1.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "num_cpus"
 version = "1.2.1"
@@ -379,6 +404,11 @@ name = "quine-mc_cluskey"
 version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "quote"
+version = "0.3.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "rand"
 version = "0.3.15"
@@ -435,6 +465,48 @@ dependencies = [
  "nom 1.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "serde"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "serde_codegen"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "quote 0.3.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_codegen_internals 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.10.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "serde_codegen_internals"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "syn 0.10.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "serde_derive"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "serde_codegen 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "serde_json"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "dtoa 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itoa 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "siphasher"
 version = "0.2.1"
@@ -447,7 +519,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "socket-priority"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -458,6 +530,15 @@ name = "strsim"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "syn"
+version = "0.10.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "quote 0.3.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "term_size"
 version = "0.2.1"
@@ -546,6 +627,11 @@ name = "unicode-width"
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "unicode-xid"
+version = "0.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "unreachable"
 version = "0.1.1"
@@ -606,19 +692,22 @@ dependencies = [
 "checksum byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "0fc10e8cc6b2580fda3f36eb6dc5316657f812a3df879a44a66fc9f0fdbc4855"
 "checksum byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c40977b0ee6b9885c9013cd41d9feffdd22deb3bb4dc3a71d901cc7a77de18c8"
 "checksum bytes 0.4.0-dev (git+https://github.com/carllerche/bytes)" = "<none>"
+"checksum cargo_metadata 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "84e3b2d1646a740bb5aae05f7c0a7afd8ae40ea244f78bc36ac25fc8043a54a5"
 "checksum cfg-if 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "de1e760d7b6535af4241fca8bd8adf68e2e7edacc6b29f5d399050c5e48cf88c"
 "checksum clap 2.19.3 (registry+https://github.com/rust-lang/crates.io-index)" = "95b78f3fe0fc94c13c731714363260e04b557a637166f33a4570d3189d642374"
-"checksum clippy 0.0.111 (registry+https://github.com/rust-lang/crates.io-index)" = "255e5979e1c3a42f6e86f822f947da8441be820fe39567b672df84dd7ecac9d7"
-"checksum clippy_lints 0.0.111 (registry+https://github.com/rust-lang/crates.io-index)" = "1bc37a74b62bcf61cb704a0d16b2e972908413eae1493f421d32fd8072073087"
+"checksum clippy 0.0.112 (registry+https://github.com/rust-lang/crates.io-index)" = "a700fde98bae726f323ff0361cf38e5a37038fa9e5dca5b89fd90824c217c93f"
+"checksum clippy_lints 0.0.112 (registry+https://github.com/rust-lang/crates.io-index)" = "51461bf5f0862158b3239e55af263d5fe67620ccbb824f87c9ed0f7cd1ce1184"
 "checksum clockpro-cache 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "83779adb8130382bbc0f602356a3fa832988cfc59440bb6501f8ee8aece72d7f"
 "checksum coarsetime 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "32309fffcf9eee2ddfaad848f9ed6ecb4fbff9d541794dc7d4aa539ca377ea84"
 "checksum dnstap 0.1.3 (git+https://github.com/jedisct1/rust-dnstap)" = "<none>"
+"checksum dtoa 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "87a527ff375a9761c677bb24a677ce48af8035ba260e01e831e4e4b04f945d2a"
 "checksum env_logger 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "99971fb1b635fe7a0ee3c4d065845bb93cca80a23b5613b5613391ece5de4144"
 "checksum fnv 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "6cc484842f1e2884faf56f529f960cc12ad8c71ce96cc7abba0a067c98fee344"
 "checksum framestream 0.1.1 (git+https://github.com/jedisct1/rust-framestream)" = "<none>"
 "checksum httparse 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a6e7a63e511f9edffbab707141fbb8707d1a3098615fb2adbd5769cdfcc9b17d"
 "checksum hyper 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)" = "33738192795f6a9915ec1fc2a4cdd79894c0004aff7a156ddf87f6e6b6e6080d"
 "checksum idna 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1053236e00ce4f668aeca4a769a09b3bf5a682d802abd6f3cb39374f6b162c11"
+"checksum itoa 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5537accdedeaa51526addad01e989bdaeb690e8e5fcca8dce893350912778636"
 "checksum jumphash 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "02f0e5a747c7d2ca0261d475f357aeee545bcff7fa01d331c9a31102ee10042b"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
 "checksum language-tags 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a91d884b6667cd606bb5a69aa0c99ba811a115fc68915e7056ec08a46e93199a"
@@ -635,12 +724,14 @@ dependencies = [
 "checksum net2 0.2.26 (registry+https://github.com/rust-lang/crates.io-index)" = "5edf9cb6be97212423aed9413dd4729d62b370b5e1c571750e882cebbbc1e3e2"
 "checksum nix 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a0d95c5fa8b641c10ad0b8887454ebaafa3c92b5cd5350f8fc693adafd178e7b"
 "checksum nom 1.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "a5b8c256fd9471521bcb84c3cdba98921497f1a331cbc15b8030fc63b82050ce"
+"checksum num-traits 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)" = "a16a42856a256b39c6d3484f097f6713e14feacd9bfb02290917904fae46c81c"
 "checksum num_cpus 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a225d1e2717567599c24f88e49f00856c6e825a12125181ee42c4257e3688d39"
 "checksum privdrop 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "155d6604ad2ea639e4dbd79d51ac1ace87fc1701d8e955a47aea1db529d69b2e"
 "checksum prometheus 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "e1a4c5d63fb87824169dee5286dbb880d4b0a3ce0aad74dca1ac4afdad83b267"
 "checksum protobuf 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "22eaac7d4be49a479dbd875f6f84ab79eef282aa51ba36ce884ec10efd91d355"
 "checksum quick-error 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7ac990ab4e038dd8481a5e3fd00641067fcfc674ad663f3222752ed5284e05d4"
 "checksum quine-mc_cluskey 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "07589615d719a60c8dd8a4622e7946465dfef20d1a428f969e3443e7386d5f45"
+"checksum quote 0.3.12 (registry+https://github.com/rust-lang/crates.io-index)" = "e7b44fd83db28b83c1c58187159934906e5e955c812e211df413b76b03c909a5"
 "checksum rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "022e0636ec2519ddae48154b028864bdce4eaf7d35226ab8e65c611be97b189d"
 "checksum redox_syscall 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)" = "8dd35cc9a8bdec562c757e3d43c1526b5c6d2653e23e2315065bc25556550753"
 "checksum regex 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4278c17d0f6d62dfef0ab00028feb45bd7d2102843f80763474eeb1be8a10c01"
@@ -649,10 +740,16 @@ dependencies = [
 "checksum rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "c5f5376ea5e30ce23c03eb77cbe4962b988deead10910c372b226388b594c084"
 "checksum semver 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)" = "d4f410fedcf71af0345d7607d246e7ad15faaadd49d240ee3b24e5dc21a820ac"
 "checksum semver 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2d5b7638a1f03815d94e88cb3b3c08e87f0db4d683ef499d1836aaf70a45623f"
+"checksum serde 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "094007819be58bf08af041535655d4a9afa2ebe89eeb36db0aa8edd7c9dbfd62"
+"checksum serde_codegen 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1f94de585a73dfc312ca77194209278a587bf90d3edc6c2d0fc479b0ed71d1f0"
+"checksum serde_codegen_internals 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)" = "afad7924a009f859f380e4a2e3a509a845c2ac66435fcead74a4d983b21ae806"
+"checksum serde_derive 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "735d239ec436373ea6b8b5dc48597f3e130b8e5ccba69fb7001146a5af73f59f"
+"checksum serde_json 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1af1d91384b4664ecc2e7d0fd87b01a5d20da6733a957ec44ee388e68844c4b3"
 "checksum siphasher 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2ffc669b726f2bc9a3bcff66e5e23b56ba6bf70e22a34c3d7b6d0b3450b65b84"
 "checksum slab 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "17b4fcaed89ab08ef143da37bc52adbcc04d4a69014f4c1208d6b51f0c47bc23"
-"checksum socket-priority 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4a6dcaa39f99e71007a220ff89c0976b10b903543763bdef923e141eda749847"
+"checksum socket-priority 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "9c8c157aab31873a138e0381122a4451733c117224b538c41a49d72da4ff4381"
 "checksum strsim 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "67f84c44fbb2f91db7fef94554e6b2ac05909c9c0b0bc23bb98d3a1aebfe7f7c"
+"checksum syn 0.10.8 (registry+https://github.com/rust-lang/crates.io-index)" = "58fd09df59565db3399efbba34ba8a2fec1307511ebd245d0061ff9d42691673"
 "checksum term_size 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3f7f5f3f71b0040cecc71af239414c23fd3c73570f5ff54cf50e03cef637f2a0"
 "checksum thread-id 3.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4437c97558c70d129e40629a5b385b3fb1ffac301e63941335e4d354081ec14a"
 "checksum thread_local 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7793b722f0f77ce716e7f1acf416359ca32ff24d04ffbac4269f44a4a83be05d"
@@ -665,6 +762,7 @@ dependencies = [
 "checksum unicode-normalization 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "5e94e9f6961090fcc75180629c4ef33e5310d6ed2c0dd173f4ca63c9043b669e"
 "checksum unicode-segmentation 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c3bc443ded17b11305ffffe6b37e2076f328a5a8cb6aa877b1b98f77699e98b5"
 "checksum unicode-width 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "bf3a113775714a22dcb774d8ea3655c53a32debae63a063acc00a91cc586245f"
+"checksum unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f860d7d29cf02cb2f3f359fd35991af3d30bac52c57d265a3c461074cb4dc"
 "checksum unreachable 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1f2ae5ddb18e1c92664717616dd9549dde73f539f01bd7b77c2edb2446bdff91"
 "checksum url 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f5ba8a749fb4479b043733416c244fa9d1d3af3d7c23804944651c8a448cb87e"
 "checksum utf8-ranges 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "662fab6525a98beff2921d7f61a39e7d59e0b425ebc7d0d9e66d316e55124122"