Fix MD5 on 64-bit Linux
Fix MD5 on 64-bit Linux

fixed MD5 to work properly on 64bits (causing HTTPS timeouts on 64bit Linux)

zsx/r3,zsx/r3,Pointillistic/rebol-lang,Pointillistic/rebol-lang,Pointillistic/rebol-lang,zsx/r3,zsx/r3,Pointillistic/rebol-lang