Merged from trunk 7792:7838

   Merged from trunk 7792:7838

   | 7793     | When --with-bdeps=y is enabled for built packages, pull in  |
   | zmedico  | build time deps as requested, but marked them as            |
   |          | "satisfied" since they are not strictly required. This      |
   |          | allows more freedom in the merge order calculation for      |
   |          | solving circular dependencies. Don't convert to PDEPEND     |
   |          | since that could make --with-bdeps=y less effective if it   |
   |          | is used to adjust merge order to prevent built_with_use()   |
   |          | calls from failing.                                         |

   | 7794     | Flush stdout before calling pkg_info() to ensure that       |
   | zmedico  | output always shows in the correct order.                   |

   | 7795     | Flush stderr and stdout if their file descriptors are in    |
   | zmedico  | fd_pipes at the beginning of spawn().                       |

   | 7796     | In spawn(), initialize default fd_pipes before doing the    |
   | zmedico  | stdout/stderr flush.                                        |

   | 7797     | When --deep is not enabled, many dependencies are dicarded  |
   | zmedico  | and left out of the digraph. This patch prevents            |
   |          | dependencies from being discarded in some cases where the   |
   |          | are needed in order to optimize merge order. It also        |
   |          | modifies the DepPriority.rebuild attribute so that it only  |
   |          | applies to build time dependencies. This leads to better    |
   |          | merge order in some cases when --deep is not enabled. For   |
   |          | example, `emerge xf86-input-keyboard xorg-server` will now  |
   |          | properly merge xorg-server before xf86-input-keyboard       |
   |          | (problem from bug #192254, comment #5).                     |

   | 7798     | tweak get_config() so that it only executes one external    |
   | SpankMan | binary (sed) instead of chaining multiple ones              |

   | 7799     | fix possible information leak vulnerability when doing a    |
   | SpankMan | merge of configuration files and be better about handling   |
   |          | of whitespace in $TMP in a few places                       |

   | 7800     | s/note/not/ reported by p-y.                                |
   | zmedico  |                                                             |

   | 7801     | Bug #190179 - Use `prelink --verify filename` to write the  |
   | zmedico  | temp file via stdout since --undo fails when run as a       |
   |          | normal non-superuser because it tries to chown the output   |
   |          | file. Also, use mkstemp() to eliminate the need for locking |
   |          | the temp file. Thanks to Israel G. Lugo                     |
   |          | <israel.lugo@lugosys.com> for the initial patch.            |

   | 7802     | Initialize ${TMP} before registering the die trap so that   |
   | zmedico  | we're sure which directory die will clean up.               |

   | 7803     | Bug #74615 - Quote all file paths inside dispatch-conf      |
   | zmedico  | shell commands.                                             |

   | 7804     | Bugs #168772 and #193695 - During unmerge, only ignore      |
   | zmedico  | specific exceptions raised from unlink() and rmdir() calls. |

   | 7805     | Bug #193695 - Add support for FreeBSD chflags during        |
   | zmedico  | unmerge. This code is adapted from the code that already    |
   |          | exists in movefile() for the merge phase.                   |

   | 7806     | In movefile() FreeBSD chflags handling, use chflags instead |
   | zmedico  | of lchflags when temporarily adjusting the flags on the     |
   |          | parent directory since we want to follow any symlinks to    |
   |          | the real parent directory.                                  |

   | 7807     | Bug #193695 - Add FreeBSD chflags support for rmdir() calls |
   | zmedico  | during unmerge.                                             |

   | 7808     | Bug #192341 - Eliminate the dependency on py-freebsd by     |
   | zmedico  | implementing it's chflags() and lchflags() functions as     |
   |          | wrappers around the chflags command (which should always be |
   |          | available in any case). The functions are only called when  |
   |          | merging/unmerging files that actually have flags set so the |
   |          | performance difference should be negligible.                |

   | 7834     | Bug #192341 - When the chflags command does not exit        |
   | zmedico  | successfully, try to generate an informative error. First,  |
   |          | use stat or lstat to try and generate an ENOENT error. It   |
   |          | the path exists, verify that the chflags binary exists and  |
   |          | raise CommandNotFound if necessary. Finally, simply         |
   |          | generate an EPERM OSError with the output of the command    |
   |          | since we're not sure exactly why it failed or what the real |
   |          | errno was.                                                  |

   | 7835     | Set non-blocking mode on the pty master file descriptor     |
   | zmedico  | while the slave file descriptor is still held open since    |
   |          | otherwise the fcntl call can fail on FreeBSD (the child     |
   |          | process might have already exited and closed the slave file |
   |          | descriptor so we have to keep it open in order to avoid     |
   |          | FreeBSD potentially generating an EAGAIN exception). This   |
   |          | appoach is cleaner than triggering the exception and being  |
   |          | forced to handle it somehow.                                |

   | 7838     | Bug #192706 - Do not print a summary at the end of          |
   | zmedico  | --depclean if there is nothing to clean and --quiet is      |
   |          | enabled.                                                    |

svn path=/main/branches/prefix/; revision=7882