RC4: speedups
RC4: speedups

creatuity/phpseclib,kenichiii/phpseclib,phpseclib/phpseclib,danog/phpseclib,melya/phpseclib,splitice/phpseclib,terrafrost/phpseclib,thaigialai1987/phpseclib,paragonie-scott/phpseclib,paragonie-scott/phpseclib,splitice/phpseclib,danog/phpseclib,kenichiii/phpseclib,melya/phpseclib,creatuity/phpseclib,metaclassing/phpseclib,thaigialai1987/phpseclib,metaclassing/phpseclib