Update to 3.0-2122-g47f45a0c

• Raise 'package' phase timeout to 2 hours
• image: Use makefs(2) to generate ufs2 disks
• image: makefs use -s for size
• HTML json top: Remove disconnected code
• HTML json jail: Fix 'latest' not populating always.
• pkgclean: Exit 0 if no packages are left to cleanup.
• pkgclean: Fix -a to work properly
• err: Don't show 'Error' if exiting 0
• bulk/pkgclean: Don't allow specifying '' as a package
• pkgclean -a: Remove pkg repository as well
• pkgclean -a: Add a note about manually removing the PACKAGES directory
• Don't fail if 'ulimit -a' fails somehow
• LOCAL_MTREE_EXCLUDES: Add missing leading '.'
• Update sh from FreeBSD head @ r317912
• jail: Add -D option to keep git history
• jail: Document -D option for jail creation