Update to latest libucl
Print orphaned packages in pkg version when comparing with the INDEX file.

They are printed when comparing with the ports tree or the remote
catalogue, so make it consistent.
Remove unused code
Name is the unicity
Fix pkg upgrade leaving directories behind

Fixes:	#1085
Remove unused vars
The mtree is dead since pkg 1.3, remove now useless code
Plug memory leaks
Improve error message, plug memory leak and simplify code
Add documentation for -I
Case-sensitive description was wrong
Add periods for consistency