Merged from trunk 6719:6733

   Merged from trunk 6719:6733

   +------------------------------------------------------------------------+
   | 6720      | Make binarytree.prevent_collision() update the Packages    |
   | zmedico   | index since it changes the PATH attribute.                 |
   |-----------+------------------------------------------------------------|
   | 6721      | Add a VERSION attribute to the Packages index header and   |
   | zmedico   | reject any index with an unsupported version (current      |
   |           | supported version is 0).                                   |
   |-----------+------------------------------------------------------------|
   | 6722      | Include SHA1 digests in the Packages index.                |
   | zmedico   |                                                            |
   |-----------+------------------------------------------------------------|
   | 6723      | If PORTAGE_BINHOST is defined then use it as a URI         |
   | zmedico   | attribute in the Packages index header.                    |
   |-----------+------------------------------------------------------------|
   | 6724      | copyrights.. id? what?                                     |
   | WarnerBro |                                                            |
   |-----------+------------------------------------------------------------|
   | 6725      | Use the PORTAGE_BINHOST_HEADER_URI environment variable to |
   | zmedico   | define the URI header field for the Packages index. If the |
   |           | URI header field is defined then the client will use it as |
   |           | a base URI for fetching packages.                          |
   |-----------+------------------------------------------------------------|
   | 6726      | Remove pym/{cache,elog_modules} directory symlinks since   |
   | zmedico   | they lead to upgrade/downgrade issues. These modules       |
   |           | probably aren't referenced from outside of portage anyway. |
   |           | There's a hack in config.load_best_module() so that        |
   |           | cache.* in /etc/portage/modules will first try cache.* and |
   |           | then try portage.cache.* if there's an ImportError.        |
   |-----------+------------------------------------------------------------|
   | 6727      | Fix broken usage of lstrip in creating the PROFILE header  |
   | zmedico   | field.                                                     |
   |-----------+------------------------------------------------------------|
   | 6728      | For bug #164655, port quickpkg to python and use the       |
   | zmedico   | tarfile module for proper handling of symlinks to          |
   |           | directories. Thanks to Martin Parm <parmus@diku.dk> for    |
   |           | the initial port.                                          |
   |-----------+------------------------------------------------------------|
   | 6729      | Fix typo.                                                  |
   | zmedico   |                                                            |
   |-----------+------------------------------------------------------------|
   | 6730      | Improve support for slot deps atoms given on the command   |
   | zmedico   | line. Thanks to Flameeyes for reporting.                   |
   |-----------+------------------------------------------------------------|
   | 6732      | Document EXTRA_ECONF, thanks to Arfrever FTA in bug        |
   | zmedico   | #167057.                                                   |
   |-----------+------------------------------------------------------------|
   | 6733      | Add ECONF_SOURCE to the econf docs.                        |
   | zmedico   |                                                            |
   +------------------------------------------------------------------------+

svn path=/main/branches/prefix/; revision=6734