[Dovecot] tcp-wrappers.patch

[Edgar Fuß]

> Why this? I do this with iptables.
Hm. Mainly because I find hosts.{allow,deny} easier to handle in this case than (i)pf.conf. It's also somewhat more staightforward to maintain a single pair of hosts.* files consistent accross all mail servers than to deal with individual packet filter rules.
And, if you like to, you can do more elaborate things with tcp wrappers than what I mentioned (and currently need).