feat(lwip):add fall back dns config in menuconfig #32

All 129 tests pass in 0s

4 files ±0 38 suites ±0 0s ⏱️ ±0s
129 tests ±0 129 ✅ ±0 0 💤 ±0 0 ❌ ±0
258 runs ±0 258 ✅ ±0 0 💤 ±0 0 ❌ ±0

Results for commit f792214. ± Comparison against earlier commit f5c4354.