sys-apps/portage-2.2.9-pre1 added.

portage-2.2.9-pre1 is based on commit 3a2a504777054e69efb705afa94d8584105d9604.

Changes since portage-2.2.8:
============================
 - 3a2a504 portage.versions.ververify(): Return an instance of bool (which
           is a subclass of int anyway) for better __repr__.

 - ecf817d Bug #497238: Fix unnecessary rebuild caused by equal versions
           in different repositories.

 - c980aac Use empty value of masters attribute in test suite when
           possible.

 - 5007501 Use with statements.

 - c508940 ResolverPlayground: Write layout.conf if needed

 - 6ba4934 Update dates in recently changed files.

 - 8fa39c6 Russian translation update.  Bug # 450372

 - 7757dc3 Delete some references to deprecated PORTDIR and PORTDIR_OVERLAY
           variables in documentation.

 - dbf5391 Update the release notes for a release.