Remove DJGPP (and therefore WATT32) #ifdef's.

DJGPP is no longer a supported platform.  Remove all #ifdef, etc.,
cases that refer to it.  DJGPP also #define'd WATT32, so that
is now removed as well.
RT 1505: Use SSL3_AL_FATAL not "2"

Use SSL3_AL_FATAL instead of the literal constant "2"
Every bit of cleanup helps.
Reviewed-by: Matt Caswell <matt@openssl.org>