Mediawiki_mariadb recipe improvements.

* Unified dumpdb_mysql.sh script.
* Added the restoredb_mysql wrapper script.

.recipes/mediawiki_mariadb/docker-compose.yml

@@ -1,6 +1,5 @@
 # MediaWiki with MariaDB (optionally with extensions).
 #
-#version: '3'
 services:
   # https://hub.docker.com/_/mediawiki
   mediawiki:
@@ -17,10 +16,9 @@ services:
       # Needs R/W UID:GID 33:33 (www-data:www-data).
       - ./storage/volumes/mediawiki_images:/var/www/html/images
       # After initial setup, download LocalSettings.php
-      # populate the following line and
-      # use compose to restart the mediawiki service.
+      # populate the following line and restart the mediawiki service.
       # Needs read UID or GID 33 (www-data).
-      # - ./configs/LocalSettings.php:/var/www/html/LocalSettings.php:ro
+      #- ./configs/LocalSettings.php:/var/www/html/LocalSettings.php:ro
     extra_hosts:
       - "host.docker.internal:host-gateway"
     labels: