Merged from trunk -r11505:11515

   Merged from trunk -r11505:11515

   | 11506   | Document FEATURES=preserve-libs.                             |
   | zmedico |                                                              |

   | 11508   | Move the world file update code out of update_config_files() |
   | zmedico | since it should not be relative to PORTAGE_CONFIGROOT.       |
   |         | Thanks to grobian for reporting.                             |

   | 11509   | Define __all__ and remove unused imports found by pyflakes.  |
   | zmedico |                                                              |

   | 11510   | Bug #237526 - Use portage.util.grablines() for exception     |
   | zmedico | handling when reading the unread file.                       |

   | 11511   | Fix PYTHONPATH adjustments to only insert a colon when       |
   | zmedico | necessary. This is necessary since having a stray colon      |
   |         | causes python to interpret the empty path entry as "." which |
   |         | triggers the following message if cwd happens to contain a   |
   |         | directory names "os": warning: Not importing directory 'os': |
   |         | missing __init__.py Thanks to Joe Peterson <lavajoe@g.o> for |
   |         | reporting.                                                   |

   | 11512   | Remove unneeded quotes from PYTHONPATH assignments and also  |
   | zmedico | fix one more potential redundant colon inside                |
   |         | misc-functions.sh.                                           |

   | 11513   | Improve error messages for issues with the SYNC variable     |
   | zmedico | inside action_sync().                                        |

   | 11514   | Fix broken reference to self.files inside                    |
   | zmedico | SpawnProcess._start().                                       |

   | 11515   | Remove everything related to the eapi* default phase         |
   | zmedico | functions since they are not included in the current EAPI 2  |
   |         | draft.                                                       |

svn path=/main/branches/prefix/; revision=11568