postgress: reduce the number of open connectins to fit under default limit

server/tinode.conf

@@ -246,9 +246,9 @@
 
 				// PostgreSQL connection pool settings.
 				// Maximum number of open connections to the database. Zero means unlimited.
-				"max_open_conns": 64,
+				"max_open_conns": 50,
 				// Maximum number of connections in the idle connection pool. Zero means no idle connections are retained.
-				"max_idle_conns": 64,
+				"max_idle_conns": 50,
 				// Maximum amount of time a connection may be reused. Zero means unlimited.
 				"conn_max_lifetime": 60,
 				// Maximum amount of time waiting for a connection from the pool. Zero means no timeout.