Setting the location of proc independent of configdir

[Simon Matter]

> I was interested to see someone suggesting putting proc into tmpfs.
> That's slightly painful if /var/imap is in ZFS: the order in which
> mounts take place means you can't just put /var/imap/proc tmpfs into /
> etc/vfstab if /var/imap is coming in through ZFS.  A glance at the
> source code says that proc is hardwired to be configdir/proc.  Would
> it be worth considering making procdir: a configuration option, so
> that it can easily be put somewhere which isn't under configdir:?
> Indeed, for a lot of people, just shoving it in /tmp/cyrusproc would
> be a good option.

I didn't test but doesn't a symlink work?

Simon