sysutils/auto-admin: Update to 0.6.12

Improvements to auto-admin menu
auto-update-system: Add support for reinstalling specified ports from source
auto-pkgsrc-setup: Add PKGSRC dir to mk.conf for pkg_chk
auto-install-packages: Add CLI flags for installing from source and skipping
options dialog
Add Darwin and pkgsrc support to some scripts
UI improvements to several scripts