Merged from trunk -r13939:13949

   Merged from trunk -r13939:13949

   | 13940   | Fix filter_loglevels() and filter_phases() to work with      |
   | zmedico | unicode.                                                     |

   | 13941   | Make getconfig() return unicode type and remove              |
   | zmedico | corresponding env_update() workaround from bug #280460.      |

   | 13942   | In shlex_split(), don't encode unicode for py3k. Thanks to   |
   | zmedico | Arfrever.                                                    |

   | 13943   | In getconfig(), specify utf_8 encoding for py3k.             |
   | zmedico |                                                              |

   | 13944   | Make spawn decode unicode in order to avoid a potential      |
   | zmedico | UnicodeEncodeError from os.execve().                         |

   | 13945   | Convert environment variables to unicode inside the config   |
   | zmedico | constructor, in order to avoid potential UnicodeDecodeError  |
   |         | exceptions later.                                            |

   | 13946   | In config.__setitem__(), convert keys/values to unicode in   |
   | zmedico | order to avoid potential UnicodeDecodeError exceptions       |
   |         | later.                                                       |

   | 13947   | Open repo_name in text mode (unicode).                       |
   | zmedico |                                                              |

   | 13948   | Use writemsg_stdout() for safe unicode output.               |
   | zmedico |                                                              |

   | 13949   | Account for hardlinks when computing SIZE metadata.          |
   | zmedico |                                                              |

svn path=/main/branches/prefix/; revision=14032