Merged from trunk -r13383:13387

   Merged from trunk -r13383:13387

   | 13384   | Use declare -F to check existence of function definitions,   |
   | zmedico | instead of type -t, in order to avoid use of subshells.      |

   | 13385   | Remove ccache and distcc remove_path_entry code since PATH   |
   | zmedico | is always initialized from scratch so there's no danger of   |
   |         | accumulation.                                                |

   | 13386   | Fix breakage in PREROOTPATH logic from the EAPI 3 code.      |
   | zmedico |                                                              |

   | 13387   | Automatically define errno.ESTALE if it doesn't exist (like  |
   | zmedico | on interix). Thanks to Markus Duft <mduft@g.o> for           |
   |         | reporting.                                                   |

svn path=/main/branches/prefix/; revision=13394