Merged from trunk 6550:6560

   Merged from trunk 6550:6560

   +------------------------------------------------------------------------+
   | 6550     | Catch a potential OSError if the child process has already  |
   | zmedico  | died.                                                       |
   |----------+-------------------------------------------------------------|
   | 6551     | Only show extra whitespace where there are some news items  |
   | zmedico  | to display.                                                 |
   |----------+-------------------------------------------------------------|
   | 6552     | Fall back to pickle if cPickle is unavailable. Thanks to    |
   | zmedico  | Michael Haubenwallner <michael.haubenwallner@salomon.at>    |
   |          | for reporting.                                              |
   |----------+-------------------------------------------------------------|
   | 6553     | fix from James C. Georgas to not modify EXTRA_EINSTALL      |
   | SpankMan | #178544                                                     |
   |----------+-------------------------------------------------------------|
   | 6554     | For bug #176539, add a "manifest" target to repoman so that |
   | zmedico  | there's a simple way to just generate a Manifest.           |
   |----------+-------------------------------------------------------------|
   | 6555     | Avoid permission errors when trying to lock repo_path. Note |
   | zmedico  | that the lock file should be mapped into /var somewhere.    |
   |----------+-------------------------------------------------------------|
   | 6556     | In --tree output, keep track of which graph edges have      |
   | zmedico  | already been displayed and try not to display a given edge  |
   |          | more than once.                                             |
   |----------+-------------------------------------------------------------|
   | 6557     | Add edges to shown_edges at the first oportunity.           |
   | zmedico  |                                                             |
   |----------+-------------------------------------------------------------|
   | 6558     | For bug #178378, make the default src_compile() check for   |
   | zmedico  | configure in ${ECONF_SOURCE:-.} (instead of just .) before  |
   |          | it calls econf. Thanks to James C. Georgas                  |
   |          | <jgeorgas@rogers.com>.                                      |
   |----------+-------------------------------------------------------------|
   | 6559     | Use device number and i-node number (like os.path.samefile  |
   | zmedico  | does) to check if the current directory is inside a given   |
   |          | overlay. This solves issues with path comparison and        |
   |          | symlinks.                                                   |
   |----------+-------------------------------------------------------------|
   | 6560     | For bug #179206, improve efficiency by using a containment  |
   | zmedico  | test instead of str.count inside update_dbentry. Thanks to  |
   |          | Jason Lai <jason.lai@gmail.com>.                            |
   +------------------------------------------------------------------------+

svn path=/main/branches/prefix/; revision=6594