Fix typo, pkg_static -> pkg-static

Reported by:	des
Be posixly correction with long options
Fix symlinks checksum verification in pkg_delete.
Update to the recent libucl.

This update was necessary due to bug found in ucl parser related to
variables parsing.
Update to release candidate 3.
Add forgotten files.
Add --raw-format to info/search

It gives the ability to chose the output format of the -R/--raw options
between json, json-conpact and yaml (default on yaml)
Be more user-friendly while printing errors.
Ignore not top level packages with missing fields.
Make dependency missing message more informative.
Add mirror implementation for binary packages.
Add mirror_pkg function to repo ops.
Add mirror flag.
Add support of mirroring to pkg-fetch.
Update libpkg.ver
Add special treatment for mirroring jobs.
Start to fix displaying.
Update documentation.
More fixes to displaying.
Remove flag -m from pkg-fetch (use -o instead).