Add a VSL tag "Storage" which tells us which stevedore the object
went into.
Force the object into the -sfile storage
Move the EXP_Touch() logic into EXP_Touch().
Now that we have -S as default, also make "-T localhost:0" the default.

This picks a random port number, possibly two, one for IPv4 and one for
IPv6, and varnishadm() can find those in VSM.
Align documentation with new defaults.
Allow the /mask to be inside the "....." in ACLs.
A user-guide section about bossing varnishd around with the CLI
Search for backtrace function in libexecinfo
Renovate varnishtest a bit.

Define a macro for all programs, so they can be overwritten from
the command line.

Change '-i' to mean "You're in a source tree":

	Find top of build-tree by reading Makefile

	Set $PATH which can find all programs
Define a "vmod_xxx" macro for each vmod and redefine it suitably
when -i is given.

This allows the testcases to be written:
	import ${vmod_directors};

Add a feature for ${topbuild} and test it in the remaining to tests
which use ${topbuild}.  I don't see any obvious way to write those
two cases without needing ${topbuild}.

I belive we are now very close to being able to run our testcases
out of tree.