location of Unix socket

At present the Unix socket's location is hard-coded as /tmp.

As a result of a bug report, I have moved it in the Debian package to
/var/run/postgresql/. (The bug was that tmpreaper was deleting it and
thus blocking new connections.)

I suppose that we cannot assume that /var/run exists across all target
systems, so could the socket location be made a configurable parameter
in 7.1?

--
Oliver Elphick Oliver(dot)Elphick(at)lfix(dot)co(dot)uk
Isle of Wight http://www.lfix.co.uk/oliver
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