Merged from trunk -r11455:11460

   Merged from trunk -r11455:11460

   | 11456   | Add a new filter_protected command which is similar to       |
   | zmedico | is_protected but works by reading filenames from stdin and   |
   |         | writing to stdout only the filenames that are protected.     |
   |         | This allows an unlimited number of files to be checked via a |
   |         | single portageq call.                                        |

   | 11457   | Flush stdout after the loop inside filter_protected()        |
   | zmedico | completes.                                                   |

   | 11458   | Fix the loop in filter_protected() to continue when          |
   | zmedico | necessary due to an error.                                   |

   | 11459   | Fix spelling typos in error messages.                        |
   | zmedico |                                                              |

   | 11460   | Fix grammar. Thanks to ABCD.                                 |
   | zmedico |                                                              |

svn path=/main/branches/prefix/; revision=11463