SSH/Agent/Identity: replace user_error's with exceptions
SSH/Agent/Identity: replace user_error's with exceptions

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