This reduces the check-gssmask runtime from around 7min to 1-2sec on
my laptop.
It is, perhaps, suboptimal to disable Nagle for a program that writes
successive 4-byte units of a protocol message in separate syscalls
rather than a single batch, and might be better to instead disable
delayed acks, but:
(a) there's no portable API for disabling delayed acks, and
(b) this program appears to be used exclusively for testing anyway.
fix https://github.com/heimdal/heimdal/issues/1139
This wasn't having the intended effect because after we #include
config.h and #undef ENABLE_PTHREAD_SUPPORT we then #include other
headers that also #include config.h. I've moved this lower so that
it has the effect that appears to be intended but the correct answer
may be to make it work but this will require #including pthread.h
as the build fails with -Werror when pthread functions are called.
