Arches please test and mark stable =media-libs/libpng-1.6.21 with target KEYWORDS: alpha amd64 arm ~arm64 hppa ia64 ~m68k ~mips ppc ppc64 ~s390 ~sh sparc x86 ~ppc-aix ~amd64-fbsd ~sparc-fbsd ~x86-fbsd ~x64-freebsd ~x86-freebsd ~x86-interix ~amd64-linux ~arm-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~m68k-mint ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris ~x86-winnt
Forgot to add arches...
x86 stable
amd64 stable
Stable for PPC64.
Stable on alpha.
arm stable
Stable for HPPA.
ppc stable
done the rest