[asdf-devel] logical pathname fixes

[Faré]

I added a more functional test for logical pathnames,
and made a round of fixes for logical pathnames.
Some things are still broken on CLISP and Allegro, but I blame the
implementations
(see test/test-logical-pathname.script for details).

p-cos, janderson, pjb: I believe you are the three known users of
logical pathnames.
Can you test the latest ASDF in your respective setups? (currently 2.20.10).

—♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics• http://fare.tunes.org
Think you can, or think you can't — either way, you'll be right. — Henry Ford