Update version constant to 2019.01-rc

boot.php

@@ -35,7 +35,7 @@ use Friendica\Util\DateTimeFormat;
 
 define('FRIENDICA_PLATFORM',     'Friendica');
 define('FRIENDICA_CODENAME',     'The Tazmans Flax-lily');
-define('FRIENDICA_VERSION',      '2018.12-rc');
+define('FRIENDICA_VERSION',      '2019.01-rc');
 define('DFRN_PROTOCOL_VERSION',  '2.23');
 define('NEW_UPDATE_ROUTINE_VERSION', 1170);
 
@@ -868,4 +868,4 @@ function rdirname($path, $levels = 1)
 	} else {
 		return dirname($path);
 	}
-}
+}