Suggested by:	scoof

Yay, gcc.  Or something.

There is no way to disable warn_unused_result and glibc (or the gcc
fortification patches) add that to write in higher optimisation
levels.  We'll take the warning, but not make it fatal.

See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509 for the relevant
gcc bug report.

(as a test push)

Explicitly set BS_NONE for synth 503.

can happen if we gunzip on fetch.

By default IP renders as STRING with just the IP number, so if you
want to get the port number there too, you have to do something
like:

	set resp.http.where = client.ip + ":" + std.port(client.ip);

Not too elegant, but it will do.

Remove the "hard-coded" "foo.port" VCL variables.

healthy, rather than have hardcoded variables for
req.backend and bereq.backend's health.

use it to rename {beresp,resp,obj}.response to *.reason while
still keeping the old ones working.

Use it to also eliminate the already duplicated req.request
and bereq.request (now: *.method)

Initial doc pulled from vcl.rst

Generate doc/sphinx/reference/vcl_var.rst based on this.

log it.  Parallel use of sockets would force us to add locking
and that's simply not worth it.

Also:

Fixes #1376