Merged from trunk 6834:6860

   Merged from trunk 6834:6860

   +------------------------------------------------------------------------+
   | 6835    | Add portageq command to list preserved libs                  |
   | genone  |                                                              |
   |---------+--------------------------------------------------------------|
   | 6836    | Get registry object from vardbapi directly instead of        |
   | genone  | creating another one                                         |
   |---------+--------------------------------------------------------------|
   | 6837    | For bug #181953, prevent the circular_blocks code from       |
   | zmedico | selecting a node that's already been selected by the normal  |
   |         | node selection process.                                      |
   |---------+--------------------------------------------------------------|
   | 6839    | Pass all the of the existing package databases into          |
   | zmedico | post_emerge() so that we can use them for news and           |
   |         | preserve-libs.                                               |
   |---------+--------------------------------------------------------------|
   | 6840    | Make display_news_notification() reuse the existing          |
   | zmedico | portdbapi instance.                                          |
   |---------+--------------------------------------------------------------|
   | 6841    | Pass existing portdbapi and vardbapi instances into the      |
   | zmedico | NewsManager constructor.                                     |
   |---------+--------------------------------------------------------------|
   | 6843    | Fix broken \!found logic so that any missing files are       |
   | zmedico | properly skipped.                                            |
   |---------+--------------------------------------------------------------|
   | 6846    | For bug #182105, fix the spelling of the fd_pipes paremeter. |
   | zmedico |                                                              |
   |---------+--------------------------------------------------------------|
   | 6848    | For bug #182157, never chmod 0 symlinks before unlinking     |
   | zmedico | them.                                                        |
   |---------+--------------------------------------------------------------|
   | 6850    | For bug #182157, don't let unmerge-orphans unlink symlinks   |
   | zmedico | to directories since that can remove /lib and /usr/lib       |
   |         | symlinks.                                                    |
   |---------+--------------------------------------------------------------|
   | 6852    | Handle another case where removing a symlink to a directory  |
   | zmedico | can be harmful.                                              |
   |---------+--------------------------------------------------------------|
   | 6854    | For bug #182021, use active voice when notifying the user    |
   | zmedico | that superuser access is required.                           |
   |---------+--------------------------------------------------------------|
   | 6856    | Make repoman exit with nonzero status whenever there are qa  |
   | zmedico | issues (already does the same in commit mode). Thanks to     |
   |         | Daniel Gryniewicz <dang@gentoo.org> in bug #182166.          |
   |---------+--------------------------------------------------------------|
   | 6858    | Make the collision-protect loop check for existance of the   |
   | zmedico | destination file before checking if it's owned.              |
   |---------+--------------------------------------------------------------|
   | 6860    | Go ahead and unlink symlinks to directories when they're     |
   | zmedico | actually recorded as symlinks in the contents.               |
   +------------------------------------------------------------------------+

svn path=/main/branches/prefix/; revision=6941