binary package maintenance tool

[Dominic Fandrey]

The port sysutils/bsdadminscripts has just been updated to
version 6.0, which features pkg_upgrade, a binary only
package maintenance tool.
It makes no use of the ports tree, so unlike other build
oriented tools, you do not need a copy of the ports tree
to keep your packages up to date.
It only requires an INDEX file from pointyhead or your
personal Tinderbox.

Thanks go to Markus Schöpke and his employer
http://www.webstyle.ch (FreeBSD hosting) for extensive
feedback, testing and providing me with hardware to perform
my own tests.

Also featuring this release is UMA, a simple package/ports
meta data maintenance and locking script, to provide
consistency and locking for the coexistence of several
package maintenance tools. The port ports-mgmt/kports-qt4
will make use of UMA in future versions.

pkg_upgrade will, among other things, support parallel
background downloading from several mirrors with the next
version. This has already been implemented, but has not
yet received sufficient testing to make it into this
release.

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