Four more patches so far: 1) print only 'public' part of command-line
That is, shift over all the arguments starting with an underscore for einfo. multibuild_foreach_variant _python_multibuild_wrapper foo will be printed as: pythonX.Y: foo 2) add a function to run the command for the 'best' (default, preferred) variant. 3) use it to implement multilib_for_best_abi(). A few ebuilds will happily use it instead of the current hacks. 4) use it to run *_all() phases in distutils-r1. This fixes bug 460016 (python_configure_all() doesn't have best-impl if there's no python_configure()).
