Doc: ChangeLog: update for 2.1.9-rc1 release

ChangeLog

@@ -1,3 +1,31 @@
+* Thu Oct 03 2024 Ken Gaillot <[email protected]> Pacemaker-2.1.9
+- 134 commits with 245 files changed, 3919 insertions(+), 2142 deletions(-)
+
+- Features added since Pacemaker-2.1.8
+  + CIB: allow no-quorum-policy "fence" and deprecate "suicide"
+  + build: support building with latest libxml2
+
+- Fixes since Pacemaker-2.1.8
+  + CIB: detect newly created alerts section (regression introduced in 2.1.7)
+  + CIB: treat empty environment variables (CIB_file etc.) same as unset
+  + executor: don't block during TLS handshakes
+  + executor: discard any agent output after about 10MiB
+  + scheduler: avoid memory leak when checking for unfencing-capable devices
+  + libcrmcommon: check for overflow when parsing and manipulting date/times
+  + tools: properly handle resources removed from configuration when
+    displaying node history in crm_mon
+
+- Public API changes since Pacemaker-2.1.8
+  + libcrmcommon: add enum pcmk_ra_caps value pcmk_ra_cap_cli_exec
+  + libcrmcommon: add pcmk_cib_node_shutdown()
+  + libcrmcommon: add pcmk_parse_score()
+  + libcrmcommon: deprecate CRM_ASSERT()
+  + libcrmcommon: deprecate PCMK_VALUE_FENCE_LEGACY defined constant
+  + libstonithd: add enum stonith_call_options value st_opt_allow_self_fencing
+  + libstonithd: deprecate enum stonith_call_options value st_opt_allow_suicide
+  + libstonithd: deprecate enum stonith_call_options value st_opt_scope_local
+  + libstonithd: deprecate enum stonith_call_options value st_opt_verbose
+
 * Thu Aug 08 2024 Ken Gaillot <[email protected]> Pacemaker-2.1.8
 - 2559 commits with 511 files changed, 46898 insertions(+), 23417 deletions(-)