Merged from trunk -r13174:13180

   Merged from trunk -r13174:13180

   | 13175   | Add support for FEATURES=parse-eapi-glep-55. This feature is |
   | zmedico | only intended for experimental purposes and should not be    |
   |         | enabled under normal circumstances.                          |

   | 13176   | Remove redundant EAPI assingment inside                      |
   | zmedico | doebuild_environment().                                      |

   | 13178   | Update code for removing noauto from FEATURES since          |
   | zmedico | config.features is a set instead of a list now.              |

   | 13179   | Note that --noreplace takes precedence over options such as  |
   | zmedico | --newuse.                                                    |

   | 13180   | Note that --noreplace takes precedence over options such as  |
   | zmedico | --newuse.                                                    |

svn path=/main/branches/prefix/; revision=13194