kes Reduce bat connect timeout from 30 to 15 seconds.

kes  More restructuring and implementing BSOCK class in place of
     old bnet.c code.
kes  Remove a few unnecessary malloc() tests in crypto code.
kes  Turn off crypto calls for > 128 bits in crypto.c if HAVE_SHA2
     not defined. Bug reported by Allan Black <Allan.Black@btconnect.com>
kes  Remove duplicate HAVE_CRYPTO definition in config.h.in