Lots of juicy updates

Lots of juicy updates

Updated the various scripts to deal with /usr/lib/deprecated in a
better way (I hope).  Deprecated libs are given special mention at the
bottom of a package's .project.

Re-wrote lesspipe.sh so that now it doesn't rely on filenames to
decide how to process a file.

vtar(), xtar() are now shell aliases in zsh-pkgtools.

	* usr/lib/pkgusr/uninstall_package (dry_run,run): Deal with stuff
	that might be in /usr/lib/deprecated

	* etc/pkgusr/zsh/zsh-pkgtools (vtar,xtar): Replace with shell
	aliases.

	* usr/lib/pkgusr/update-pkg-project (upd_pkg_deps): Guard against
	xargs getting no input.
	(list_deprecated): New.

	* usr/bin/list_suspicious_files (prune_prefixes): Update the
	bastard copy, adding /usr/lib/deprecated, and sorting the list.

	* usr/bin/lesspipe.sh: Complete re-write, eliminating the use of
	filenames to determine how to process a file.

	* usr/bin/grep_all_regular_files_for (prune_prefixes): Update the
	bastard copy, adding /usr/lib/deprecated, and sorting the list.
	If running as root, set prune_prefixes to something minimal.

	* usr/bin/forall_direntries_from (prune_prefixes): Update the
	bastard copy, adding /usr/lib/deprecated, and sorting the list
	because I'm anal like that.

Signed-off-by: Steve Youngs <steve@steveyoungs.com>