Merged from trunk 7038:7052

   Merged from trunk 7038:7052

   +------------------------------------------------------------------------+
   | 7039    | Add sanity checks in fetch() and digestgen() to              |
   | zmedico | automatically detect and handle invalid empty distfiles      |
   |         | since some users have reported difficulty when trying to     |
   |         | create digests.                                              |
   |---------+--------------------------------------------------------------|
   | 7041    | Add one more size == 0 check to digestgen().                 |
   | zmedico |                                                              |
   |---------+--------------------------------------------------------------|
   | 7042    | Short circuit the loop as soon as missing hashes are         |
   | zmedico | detected.                                                    |
   |---------+--------------------------------------------------------------|
   | 7044    | Short circuit the loop as soon as missing hashes are         |
   | zmedico | detected.                                                    |
   |---------+--------------------------------------------------------------|
   | 7046    | Preserve merge order in elog output.                         |
   | zmedico |                                                              |
   |---------+--------------------------------------------------------------|
   | 7047    | Send the ebuild die message through eerror and make sure     |
   | zmedico | that elog_process() gets called when an ebuild dies. This    |
   |         | makes the elog echo module display the die message last in   |
   |         | case other elog messages push the original die message off   |
   |         | of the top of the screen.                                    |
   |---------+--------------------------------------------------------------|
   | 7050    | Format the callstack indentation more like it used to be.    |
   | zmedico |                                                              |
   |---------+--------------------------------------------------------------|
   | 7052    | For bug #144333, add a --reinstall=changed-use option which  |
   | zmedico | behaves similar to how --newuse behaved in portage-2.0.x     |
   |         | days.                                                        |
   +------------------------------------------------------------------------+

svn path=/main/branches/prefix/; revision=7054