High: crm_gui: Prompt user to disable "record-pending" only if it has been enabled in the same GUI session (bnc#825051)

And the default response in the dialog is "No" now.
Low: Build: Use the SUPPORT_COROSYNC defined from pacemaker
Fix: mgmtd: Use services_ocf_exitcode_str() if available instead of lrmd_event_rc2str()
Build: configure.in: Correctly determine BUILD_REVISION