mpich rebuilt with default c/cxx/ld flags
Heads-up: I dropped most of the build flags customizations in mpich.
This "resets" mpich back to the Fedora defaults and, inter alia, adds
all the hardening options. Unit tests pass, including those in dependent
packages, but of course this is not a definitive proof of anything. If
you see any strange crashes or slowdowns, please let me know.
Zbyszek