[asdf-binary-locations-devel] [patch] follow symlinks in source path prefixes of *source-to-target-mappings*

I have my SBCL_HOME pointing to a symlink. As a result, because ASDF chases symlinks, the SBCL-specific rule doesn't work with contribs in my environment. I work around this by chasing symlinks for all sources in *source-to-target-mappings*. This has worked well for me for a while; I include it now as a Darcs patch. -- I write stuff at http://failex.blogspot.com/ now. But the post formatter and themes are terrible for sharing code, the primary content, so it might go away sooner or later.