Redo the -n argument code, it had too many problems:

Redo the -n argument code, it had too many problems:

We need to process -P and -f arguments before we change directory.
(ticket 120)

(XXX: what about storage and hash arguments ??)

The daemon(3) call should not change our directory subsequently.
(ticket 121)

There is no need to enforce a hostname style format on the argument,
a directory nam makes much more sense, since that is what we need.
Defaulting to /tmp instead of our hostname makes more sense (ticket 119).

This also allows the admin to use a different directory if /tmp is
mounted noexec (ticket 111)

Put the directoryname used in the proctitle (via heritage)

XXX: for docs: vcl.load CLI commands will work relative to the -n directory.

git-svn-id: svn+ssh://projects.linpro.no/svn/varnish/trunk@1572 d4fa192b-c00b-0410-8231-f00ffab90ce4