Merged from trunk -r13375:13383

   Merged from trunk -r13375:13383

   | 13377   | When in --nodeps mode, make depgraph._serialize_tasks()      |
   | zmedico | preserve the package order given on the command line. Thanks |
   |         | to Markus Duft <mduft@g.o> for reporting.                    |

   | 13378   | Clarify language in repos.conf reference to repoman and      |
   | zmedico | egencache.                                                   |

   | 13379   | Exit unsuccessfully when in commit mode and nothing is found |
   | zmedico | to commit. Thanks to Jeremy Olexa <darkside@g.o> for the     |
   |         | suggestion.                                                  |

   | 13380   | Add ${PORTAGE_BIN_PATH}/ebuild-helpers/3 directory to PATH   |
   | zmedico | for EAPI 3. Thanks to Tiziano Müller <dev-zero@g.o> for     |
   |         | this patch.                                                  |

   | 13381   | In ebuild_main(), unset ebuild_helpers_path when finished    |
   | zmedico | with it, since bash exposes local variables to 'children'.   |

   | 13382   | Add new dodoc implementation for EAPI 3. Thanks to to        |
   | zmedico | Tiziano Müller <dev-zero@g.o> for this patch.               |

   | 13383   | Use ret|=1 instead of ++ret, to avoid possible overflow.     |
   | zmedico |                                                              |

svn path=/main/branches/prefix/; revision=13393