* Refactor load-system to use *load-system-operation*,
and change require-system and module-provide-asdf to use that.
* Remove broken-fasl-support: first, cormanlisp is supposed to have fixed it;
 second, cormanlisp is dead;
 third, one can now (setf *load-system-operation* 'load-source-op) instead.
* Reindent default-source-registry
* Fix a test in light of some previous package frobbing.

Don't upgrade ccl or cmucl on older asdf's due to incompatibilities.
Shouldn't matter since they already ship with more recent versions of asdf.

following discussion with Nikodemus on asdf-devel.
Also, improve the way we test for upgrade.
Disable upgrade test on cmucl from asdf 2.00*.
Restore -i.bak flag in bump-version: it's actually needed.

Update dates in index.html

Add a hook to autodetect file encoding.
Don't use :unspecific on ecl, it breaks asdf-pathname-test.script
Disable warnings testing when compiling asdf with SCL. Bug in SCL?

Make logical pathname test work on disjoint files, for now.
Fix test-upgrade wrt recent package tweak in testing.

thanks to rpgoldman for detecting the typo.

The issue fixed is that most Lisps don't like
*default-pathname-defaults* being a logical-pathname.
Added a test for logical-pathname functionality;
it all works on CCL, and works better on other Lisps after the fix,
but there are still logical-pathname issues on SBCL, CLISP and more.
Also, a package cleanup of our test suite.

When specifying a function as output-translation,
we accept either (:function symbol) or
(:function (lambda (pathname absolute-source) ...)
The second case wasn't properly handled.
Minimal testing included.
спасибо Сергей.

WEAKLY-DEPENDS-ON needed to pass the ERROR-P NIL to FIND-SYSTEM in order
to behave properly.

Added documentation for previously-undocumented weakly-depends-on.

test/script-support.lisp: cl-user::native-namestring already defined in SBCL (imported from sb-ext); don't try to redefine it.

Major change for RMCL: location strings are now POSIX namestrings.
Major change for logical pathnames: they are now preserved by source-registry;
the price is that only logical pathnames for which merging the name and type
commutes with truename will be found by directory-files and subdirectories.
Minor change for GCL: dropped kluges for 2.6, which never was working.
Simplifications in internals of (implementation-identifier).
Removed *system-cache* and get-uid, which never were working right
(bad attempts at allowing common-lisp-controller compatibility,
but it only ever was but a giant gaping security hole in the waiting).
Simplified resolve-relative-location-component
(ugly because it was written before MERGE-PATHNAMES*).
Updated documentation about the file location DSL.

Use probe-file for probe-file* in LispWorks.

Make ABCL's jar translation happier with
the recent compile-file-pathname* change for Stelian by redoing cfp myself.

Make truenamize work when the merged pathname is relative.
Makes it happier when e.g. the *default-pathname-defaults* is #p"",
which is the case notably on CCL.

Try and fail to support GCL 2.6 and have 2.7 fail less;
too many bugs, in CONDITIONs, PATHNAMEs, and more,
plus compiler bug that breaks coerce-pathname.

Nikodemus reported on the list an infortunate interaction with quicklisp.
such if when you had a system installed both in quicklisp and outside
quicklisp, say flexi-streams, and the .asd defsystem'ed an auxiliary system,
say flexi-streams-test, and you tried to load the version outside quicklisp,
e.g. by putting it first in the *central-registry*, then ASDF would
start loading the non-quicklisp .asd; during parse-component-form for the
auxiliary system, find-system would be called and then locate the quicklisp
version, since it can't be found by file name, but quicklisp includes it
in its database; ASDF would then load the quicklisp .asd; during the
parse-component-form for the main system, it would call find-system,
and the non-quicklisp .asd would be found, and so on in an infinite loop.

This patch refactors defsystem to put all the work in a function
will a trivial macro-expansion. The function pushes the system being
currently defined into a list of such systems that is specially consulted
first by search-for-system-definition, hopefully avoiding any loop.

https://bugs.launchpad.net/asdf/+bug/779935. Grrrrrrr. Add proper test.

Test support for symlinked .asd's to prevent future regressions
as per the 2.014.9 bug fixed in 2.014.16.