Update to 3.0-2592-gba53cb5b

This will be likely be 3.2 release very quickly.

• Remove bulk/testport -s. It is dangerous, bulk -S remains.
• jail -u: Update kernel based on what was passed into jail -cK.
• distclean: Require -a/-f/listed ports.
• testport: Support MOVED with destination FLAVOR.
• delete_old_pkg: Fix renamed PKGNAME detection after commit 612e3dc018c8d3.
• delete_old_pkg: Check for rename PKGNAME before version.