mail-backup: Make sure backup_interval is a string, not an integer.

Florian Schaal

2014-03-05 d9443da5f7186cae3f7235e1d51c966ba2b68206

1
ALTER TABLE `shell_user` CHANGE `ssh_rsa` `ssh_rsa` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '';