Add support for MySQL Database backend.

conf/postfix_add_mailboxes.conf.sample

@@ -15,6 +15,16 @@
 # -
 #in_file="${conf_dir}/mailboxes_new.lst"
 
+# - db_type
+# -
+# - Type of Postfix Database
+# -
+# - Possible values are 'pgsql' (PostgeSQL) or 'mysql' (MySQL)
+# - 
+# - Defaults to: db_type="pgsql"
+# -
+#db_type="pgsql"
+
 # - db_name
 # -
 # - Database name for the postfix database
@@ -23,13 +33,26 @@
 # -
 #db_name="postfix"
 
-# - db_user
+# - db_name
 # -
-# - Database user with access to the postfix database ($db_name)
+# - Database name for the postfix database
+# - 
+# - Defaults to: db_name="postfix"
 # -
-# - Defaults to: db_user="postfix"
+#db_name="postfix"
+
+# - mysql_credential_args (root access to MySQL Database)
 # -
-#db_user="postfix"
+# - Example
+# -    mysql_credential_args="--login-path=local"
+# -    mysql_credential_args="--defaults-file=/etc/mysql/debian.cnf" (Debian default)
+# -    mysql_credential_args="--defaults-file=/usr/local/mysql/sys-maint.cnf"
+# -
+# - Defaults to:
+# -    '/etc/mysql/debian.cnf' if MySQL is installed from debian package system
+# -    '/usr/local/mysql/sys-maint.cnf' otherwise
+# -
+#mysql_credential_args=""
 
 # - quota
 # -