Merged from trunk -r15825:15835

   Merged from trunk -r15825:15835

   | 15826   | Update SIGPIPE comments to refer to "[Errno 32] Broken pipe" |
   | zmedico | exceptions since this is signal hander now set automatically |
   |         | for subprocesses after the fork in portage.process.spawn().  |

   | 15827   | Revert tar error handling changes from bug #309001 since we  |
   | zmedico | can't necessarily trust tar exist status alone (reverts      |
   |         | r15820 and r15821).                                          |

   | 15828   | Bug #299095 - Always use UTF-8 codec when opening ebuilds,   |
   | zmedico | to avoid UnicodeDecodeError with python3.                    |

   | 15829   | Add a TODO note about adding a registration interface for    |
   | zmedico | eclasses to register phase hooks, in order to migrate away   |
   |         | from global scope useq() calls.                              |

   | 15830   | Fix breakage from previous commit.                           |
   | zmedico |                                                              |

   | 15831   | Bug #309699 - Update --emptytree docs. Thanks to Ben Kohler  |
   | zmedico | <bkohler@gmail.com> for wording suggestions.                 |

   | 15832   | Bug #309907 - Fix update_config_files() to handle            |
   | zmedico | package.license.                                             |

   | 15833   | Bug #310135 - Skip the changelog.ebuildadded for all         |
   | zmedico | distributed SCMs.                                            |

   | 15834   | Note that use.local.desc is automatically generated, and     |
   | zmedico | refer to GLEP 56.                                            |

   | 15835   | Fix typo.                                                    |
   | zmedico |                                                              |

svn path=/main/branches/prefix/; revision=15837