Merged from trunk 7586:7593

   Merged from trunk 7586:7593

   | 7587    | Don't generate a QA Notice if the ${S} directory doesn't     |
   | zmedico | exist since it might be irrelevant for some ebuilds.         |

   | 7589    | Optimize config.setcpv() so that it doesn't call             |
   | zmedico | regenerate() unnecessarily when there are no USE wildcards   |
   |         | to expand.                                                   |

   | 7591    | For bug #188559, invalidate dblink._contents_inodes as       |
   | zmedico | necessary to prevent FEATURES=unmerge-orphans from unmerging |
   |         | anything that belongs to the package that has just been      |
   |         | merged.                                                      |

   | 7593    | For bug #33585, leave the old info dir file in place if      |
   | zmedico | there is nothing to generate.                                |

svn path=/main/branches/prefix/; revision=7595