Restrict visibility of symbols to the symbols we actually want to be
public.

This should work around build problems

Also mark vcs_version.h as a maintainer built file, not a
configure-built file.

The various tools need version.c from libvarnish, so make that part of
the build directly.

Adjust build system accordingly.

convenience functions unless this is disabled with a #define.

Checking for isfinite does not make any sense for an integer
conversion and causes compilation problems on Solaris.

Fixes: #931

This fixes "varnishadm -t 0"

Fixes #927

object data, and therefore also deleted when we should not.

Fixes	#929

from Redpill Linpro AS to Varnish Software AS

in varnishadm and varnishreplay instead.

Conflicts:
	bin/varnishtest/vtc_varnish.c

Add stuff to libvarnishapi to make it self-sufficient.

Remove libvarnish from tools' Makefiles, they should not link
against it, to ensure that libvarnishapi is enough for such tasks.

Where we need special stuff from libvarnish, like VPF, pull
it into tools' Makefile directly.

Spotted: drwilco

Fixes: #914