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.
# use glob syntax.
syntax: glob
*~
*.py?
.*.swp
.swp
doc/build
build
debian/vmm
debian/*.log
debian/*.debhelper
debian/files
debian/*substvars
.pc