[SOGo] Use mysqladmin status instead of ping to determine readiness

[PHP-FPM] Use mysqladmin status instead of ping to determine readiness
[PHP-FPM] Init database in entrypoint
[PHP-FPM] Change API credential injection
[Dovecot] Use mysqladmin status instead of ping to determine readiness

data/Dockerfiles/dovecot/docker-entrypoint.sh

@@ -2,7 +2,7 @@
 set -e
 
 # Wait for MySQL to warm-up
-while ! mysqladmin ping --socket=/var/run/mysqld/mysqld.sock -u${DBUSER} -p${DBPASS} --silent; do
+while ! mysqladmin status --socket=/var/run/mysqld/mysqld.sock -u${DBUSER} -p${DBPASS} --silent; do
   echo "Waiting for database to come up..."
   sleep 2
 done