Merged from trunk 9501:9507

   Merged from trunk 9501:9507

   | 9502    | Check is os.statvfs() is implemented before trying to us it. |
   | zmedico | (branches/prefix r9500)                                      |

   | 9503    | Bug #214499 - When compiler flags are unset, many packages   |
   | zmedico | will substitute their own implicit flags. For uniformity,    |
   |         | use an empty string as the default.                          |

   | 9504    | Bug #211294 - Make repoman bail out if arch.list contains    |
   | zmedico | unrecognized lines since we don't want people to commit with |
   |         | old versions of portage that don't support the current       |
   |         | arch.list format.                                            |

   | 9505    | Bug #212152 - Account pre-existing files when calculating    |
   | zmedico | whether there is enough space for a download.                |

   | 9506    | Fix typo.                                                    |
   | zmedico |                                                              |

   | 9507    | Bug #212621 - Make the EbuildQuote check do quoting          |
   | zmedico | validation for misc variables from games.eclass.             |

svn path=/main/branches/prefix/; revision=9508