as a decent substitute for module-rebuild.
* Namespace sanitizing: move all portage related code into portage.* namespace,
rename portage_foo modules to portage.foo (but keep symlinks for compability)
-* Experimental support for preserving old library files on package upgrades
- based on FEATURES=preserve-libs
* Add support for news items (GLEP 42)
portage-2.1.5