Merged from trunk 9831:9860

   Merged from trunk 9831:9860

   | 9832    | In config.setcpv() and load_infodir(), always set known good |
   | zmedico | values for CATEGORY and PF, since corruption of these can    |
   |         | cause problems.                                              |

   | 9834    | Remove all calls to config.load_infodir() since it doesn't   |
   | zmedico | seem to server any purpose now that the complete environment |
   |         | is loaded from environment.bz2.                              |

   | 9835    | Remove unused infodir variable.                              |
   | zmedico |                                                              |

   | 9837    | Make doebuild() bail out early with a PermissionDenied error |
   | zmedico | if there is no write access to $PKGDIR.                      |

   | 9839    | When dep_check() expands new-style virtuals, use USE flags   |
   | zmedico | from aux_get calls to evaluate any conditionals that the     |
   |         | depstrings might contain. This works properly for ebuilds    |
   |         | now that aux_get() is backed by Package instances containing |
   |         | the correct USE.                                             |

   | 9840    | Fix the code from the previous commit so that it doesn't try |
   | zmedico | to pull USE from a portdbapi instance (like when called by   |
   |         | repoman) since portdbapi doesn't return USE in aux_get()     |
   |         | calls.                                                       |

   | 9842    | Fix 'undefined name' errors found by pyflakes.               |
   | zmedico |                                                              |

   | 9844    | Make file_get() redirect FETCHCOMMAND output to stdout just  |
   | zmedico | like portage.fetch() does. Thanks to Ramereth for reporting. |

   | 9846    | Rename the undocumented --conistent option to                |
   | zmedico | --complete-graph and add some docs.                          |

   | 9848    | Add some notes for the parallel-fetch feature and the new    |
   | zmedico | --complete-graph option for emerge.                          |

   | 9850    | Make binarytree.prevent_collision() adjust permissions on    |
   | zmedico | directories and raise a PermissionDenied error if the        |
   |         | required directories is not writable.                        |

   | 9852    | Bug #215016 - When transforming of USE flags to USE_EXPAND   |
   | zmedico | variables, filter out flags that aren't considered to be     |
   |         | part of IUSE or implicit IUSE. This patch moves all IUSE     |
   |         | dependent code from config.regenerate() to config.setcpv().  |

   | 9854    | * Optimize config.setcpv() to return early if IUSE has not   |
   | zmedico | changed since the previous setcpv() call. * Add EBUILD_PHASE |
   |         | to the blacklisted variables list.                           |

   | 9856    | Bug #217444 - Send debug-print() output to stderr so that it |
   | zmedico | can't interfere with command substitution. Thanks to Fabio   |
   |         | Rossi <rossi.f@inwind.it> for this patch.                    |

   | 9858    | Fix the filtering for bug #215016: * fix broken comparison   |
   | zmedico | for he iuse filtering * filter out any duplicates that       |
   |         | variable may contain                                         |

   | 9860    | In --buildpkgonly mode, don't discard RDEPEND and PDEPEND if |
   | zmedico | --empty or --deep are enabled. The makes it possible to run  |
   |         | `emerge -eB world` and have every single package rebuilt     |
   |         | (without actually installing anything).                      |

svn path=/main/branches/prefix/; revision=9868