postgres: Merge upstream config locale changes

Signed-off-by: Florian Pritz <bluewind@xinu.at>

roles/postgres/templates/postgresql.conf.j2

@@ -603,11 +603,11 @@ timezone = 'UTC'
 					# encoding
 
 # These settings are initialized by initdb, but they can be changed.
-lc_messages = 'en_US.utf-8'			# locale for system error message
+lc_messages = 'en_US.UTF-8'			# locale for system error message
 					# strings
-lc_monetary = 'en_US.utf-8'			# locale for monetary formatting
-lc_numeric = 'en_US.utf-8'			# locale for number formatting
-lc_time = 'en_US.utf-8'				# locale for time formatting
+lc_monetary = 'en_US.UTF-8'			# locale for monetary formatting
+lc_numeric = 'en_US.UTF-8'			# locale for number formatting
+lc_time = 'en_US.UTF-8'				# locale for time formatting
 
 # default configuration for text search
 default_text_search_config = 'pg_catalog.english'