Patch for "mv -s" option

[Brendan Byrd/SineSwiper]

I hashed out a patch for mv which is more or less the opposite of the 
"--symbolic-link" option for cp.  Instead of creating symlinks on the 
destination before the copy, it creates symlinks on the source after the 
move.

Most of the code was copied from the cp.c and copy.c code.  There is one 
minor warning in the new code (which I don't quite understand), but it 
otherwise runs fine.  I've tested it here, though it might require some 
more through testing.  For now, I've commented out the "goto un_backup" 
statements.  Eventually, these will need to be fixed.  (I would think 
the backup option is barely used, anyway.)

Also, I have a question about how files are moved.  Currently, all files 
are copied to a new diskspace, and then the old diskspace is removed. 
Why not just create a hardlink (ie: x->hard_link = 1;) and remove that 
link?  It's faster and does not fragment the hard drive.  Directories 
structures may need to be copied, but the files themselves can easily 
have a hard link.  After looking at the code, I was surprised that this 
wasn't in there.  (Actually, I'm surprised nobody bothered with this 
feature, either. :P

--
Brendan Byrd/SineSwiper <address@hidden>
Computer techie, Perl hacker, and all-purpose Internet guru
Resonator Software (http://www.ResonatorSoft.org/)