Release 12.1.2

This release contains a variety of fixes from 12.1.1-1. For information about new features in major release 12, see Release 12.1.0.

A dump/restore is not required for those running 12.1.X.

• Provides several functions that extract session and system information: pg_current_xact_id, pg_current_xact_id_if_assigned, pg_xact_status, pg_current_logicaltime, pg_current_snapshot.
• Provides function pg_stat_reset_wait_event to reset statistics counters about wait events.
• Fix execution failure of function pg_control_checkpoint.
• Fix psql version compatibility warning at startup.
• Clean available extension files on windows.
• Fixed an uninstallation issue and an installation issue with the redrock-plscheme package on Debian.
• Fixed an installation issue with the redrock-plscheme package on Redhat/CentOS.