max_memory_limit_mysql.sh: add support for MariaDB

conf/mysql_credetials.conf.sample

@@ -7,6 +7,19 @@
 
 # - MySQL / MariaDB / Percona credentials
 
+# - basename_mysql_daemon
+# -
+# - (Base)Name of the MySQL Daemon
+# -
+# - Example
+# -    basename_mysql_daemon=mysqld
+# -    basename_mysql_daemon=mariadbd
+# -
+# - Defaults to 
+# -    basename_mysql_daemon=mysqld
+# -
+#basename_mysql_daemon=mysqld
+
 # - mysql_credential_args
 # -
 # - Giving password on command line is insecure an sind mysql 5.5