martin f. krafft <madduck@madduck.net> [Mon, 09 Apr 2012 17:45:02 +0200] rev 503
Add database table for catchall destinations
Catch-all aliases are stored for a domain. Since there can be multiple
destinations per domain, this is done using a 1:n relation on the gid.
This commit extends the SQL schema definition and also provides appropriate
upgrade DDL.