use regex for dkim-integration in distribution-specific files, too

floria030

2014-02-05 8100f25edc779ee5f1b2ca7de0cd25f38e4f5343

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auth    required   pam_mysql.so user={mysql_server_ispconfig_user} passwd={mysql_server_ispconfig_password} host={mysql_server_ip} db={mysql_server_database} table=mail_user usercolumn=login passwdcolumn=password crypt=1
account sufficient pam_mysql.so user={mysql_server_ispconfig_user} passwd={mysql_server_ispconfig_password} host={mysql_server_ip} db={mysql_server_database} table=mail_user usercolumn=login passwdcolumn=password crypt=1