K 10 svn:author V 8 cperciva K 8 svn:date V 27 2007-11-12T04:47:57.000000Z K 7 svn:log V 674 Add support for "freebsd-update -r newrelease upgrade" -- binary upgrading to new releases. Important parts of this code include * automatically determining which optional components (e.g., src, info, proflibs) are installed. * merging changes in files which are modified locally and have changed between the currently running and new release. * prompting the user to rebuild all 3rd party software before deleting old shared libraries. Yes, this is compatible with "freebsd-update rollback" -- you can test a new -BETA and roll back to the old release if you don't like it. Subject to re@ approval, this will be MFCed before 7.0-BETA3 and 6.3-RC1. MFC after: 2 days END