ENT-4170 Fix PostgreSQL default socket group

Changelog: None

This setting default was previously changed, but it was mistakenly left
commented out.

Author: nickanderson

deps-packaging/postgresql-hub/postgresql.conf.cfengine.patch

@@ -24,7 +24,7 @@
  #unix_socket_directories = '/tmp'	# comma-separated list of directories
  					# (change requires restart)
 -#unix_socket_group = ''			# (change requires restart)
-+#unix_socket_group = 'cfpostgres'			# (change requires restart)
++unix_socket_group = 'cfpostgres'			# (change requires restart)
 -#unix_socket_permissions = 0777		# begin with 0 to use octal notation
 +unix_socket_permissions = 0770		# begin with 0 to use octal notation
  					# (change requires restart)