[RFC] straightening out unit-test dependencies

During the shuffling work for SourceLayout I keep running headlong into
the few remaining unit tests which include nearly all of the squid
sources due to legacy design.

This is further hampered by the fact that the worst ones appear short
but make use of nested $() sub-list includes. So not only do they have
dependency on the .cc files but on the .cc files incuded by otehr unit
tests as well.

Does anyone object to a patch which unwinds these nested $() lists and
makes the remaining messy unit tests include their full minimal list of
.cc directly?

Amos

-- 
Please be using
   Current Stable Squid 2.7.STABLE9 or 3.1.11
   Beta testers wanted for 3.2.0.5