[PATCH] Refactor ufscommon into individual include/code files

Hi all,
  the attached patch splits ufscommon.h and .cc into specific-purpose
files, as per squid standard, and reconnects the dots.
There are no functional changes, but it removes a few FIXMEs in the
code. Test-suite-tested.

I'm not sure if this is the right time to merge, or if it's better to
wait after 3.2 ships, but here goes.

-- 
    /kinkie