Milter-greylist

Hello,

I have some old slow peers where the default
peer timeout 3 seconds are not big enough,
frequent retrials are happening.
I have some other very fast peers where
even shorter peer timeout would be sufficient.

In addition too I do not want to go and modify
the code for all the new milter-greylist versions
(changing the "#define COM_TIMEOUT 3" line in sync.c)

So I have decided to implement per peer configurable
timeout value through the configuration file.

The configuration file syntax change is only that
there is now an optional "timeout" clause for the
peer line statement with a numeric parameter
measured in seconds or optional s, m, h, etc...
letter to change the unit.

This change does not affect existing configuration
files, it is backward compatible syntactically.
There is neither semantic change, the default
timeout value is kept to be three seconds.

The 0 timeout value has a special meaning, it 
disables the connection timeout totally for that peer.

Please include my attached contribution
to the main stream of source code
if you think it might be useful for others.

Bests,
Attila