add include/openssl/*
add autotools build system for ssl and crypto
autotools: allow enable/disable *some* algorithms
rc4.c: include md5.h for MD5_DIGEST_LENGTH

rc4.c uses MD5_DIGEST_LENGTH but doesn't include md5.h.  This change
adds the include <openssl/md5.h>.
vms-helper.c: fix default int warning
speed.c, version.c: include comp.h to fix implicit func warning