Doc: ChangeLog: update for 2.1.1-rc1 release

ChangeLog

@@ -1,3 +1,44 @@
+* Mon Jul 26 2021 Ken Gaillot <kgaillot@redhat.com> Pacemaker-2.1.1-rc1
+- Changesets: 209
+- Diff:
+ 93 files changed, 4673 insertions(+), 3323 deletions(-)
+
+- Features added since Pacemaker-2.1.0
+  + enhanced support for OCF Resource Agent API 1.1 standard
+    + ocf:pacemaker:attribute and ocf:pacemaker:ping agents now support 1.1
+    + tools: crm_resource passes output format to agents so they will use it if
+             supported
+    + tools: crm_resource --validate and --force-check options accept optional
+             check level to pass to agent
+  + tools: crm_mon XML output includes stonith-timeout-ms and
+           priority-fencing-delay-ms cluster properties
+  + pacemakerd: support --output-as/--output-to options including XML output
+                with options such as --features
+
+- Fixes since Pacemaker-2.1.0
+  + pacemaker-attrd: avoid repeated unfencing of remote nodes when DC joined
+                     cluster after remote was up
+  + scheduler: avoid invalid transition when group member is unmanaged
+               (CLBZ#5423)
+  + scheduler: don't schedule probes of unmanaged resources on pending nodes
+  + fencing: select correct device when pcmk_host_check="dynamic-list" and
+             pcmk_host_map are both specified (CLBZ#5474)
+  + tools: crm_attribute supports node attribute values starting with a '-'
+           again (regression introduced in 2.1.0)
+  + tools: crm_attribute deprecated --get-value option does not require an
+           argument (regression introduced in 2.1.0)
+  + tools: better crm_resource error messages for unsupported resource types
+  + tools: crm_simulate --show-failcounts includes all relevant information
+  + tools: crm_mon should not show inactive group members without --inactive
+  + tools: crm_mon XML output should show members of cloned groups
+  + libcrmcommon: correctly handle case-sensitive XML IDs
+
+- Public API changes since Pacemaker-2.1.0
+  + libcrmcommon: add pcmk_section_e type
+  + libcrmcommon: add pcmk_show_opt_e type
+  + libcrmcommon: add pcmk_pacemakerd_api_shutdown()
+  + libpe_status: deprecate enum pe_print_options
+
 * Tue Jun 08 2021 Ken Gaillot <kgaillot@redhat.com> Pacemaker-2.1.0
 - Changesets: 849
 - Diff: