Merged from trunk 10904:10913

   Merged from trunk 10904:10913

   | 10905   | Split out a new _add_prefetchers() method from               |
   | zmedico | Scheduler._merge().                                          |

   | 10906   | Remove the Scheduler._post_merge() method, and create a new  |
   | zmedico | _show_failed_fetches() method.                               |

   | 10907   | Remove unused BinpkgMerge class.                             |
   | zmedico |                                                              |

   | 10908   | Split out a _restart_if_necessary() method from              |
   | zmedico | Scheduler._merge().                                          |

   | 10909   | Add a portage._disable_legacy_globals() function. This       |
   | zmedico | deletes the ObjectProxy instances that are used for lazy     |
   |         | initialization of legacy global variables. The purpose of    |
   |         | deleting them is to prevent new code from referencing these  |
   |         | deprecated variables. This allows the removal of the         |
   |         | PORTAGE_LEGACY_GLOBALS variable which used to serve the same |
   |         | purpose.                                                     |

   | 10910   | Clean up Scheduler.merge() and split out a                   |
   | zmedico | _save_resume_list() method.                                  |

   | 10911   | Split logging and world atom code out of                     |
   | zmedico | Scheduler._execute() task, and trigger it inside             |
   |         | EbuildPhase.execute().                                       |

   | 10912   | Remove old unused vars inside _execute_task() and fix code   |
   | zmedico | not to use the old vars.                                     |

   | 10913   | Split out a _create_prefetcher() method from                 |
   | zmedico | _add_prefetchers().                                          |

svn path=/main/branches/prefix/; revision=10914