Completed the RNG implementaion switching. Added framework for running RNG tests. Added an experimental option --enable-hmac-binary-check to configure. --This line, and those below, will be ignored--

M src/fips.c
M src/cipher-proto.h
M src/global.c
M src/hmac256.c
M src/ChangeLog
M src/hmac256.h
M src/Makefile.am
M tests/Makefile.am
M configure.ac
M doc/gcrypt.texi
M random/random-fips.c
M random/random.c
M random/rand-internal.h
M random/random.h
M random/ChangeLog
M ChangeLog
M README