[PATCH 0/2 rebase] Handle CPAN/etc. DLLs in rebaseall

[Cygwin/X]

The following patchset is an attempt to merge perlrebase/rubyrebase/etc.
into rebaseall, for reasons I previously discussed last month: 

http://cygwin.com/ml/cygwin/2013-01/msg00356.html


Yaakov