SFTP: Fix broken mkdir
SFTP: Fix broken mkdir

Thanks Antek88!

paragonie-scott/phpseclib,metaclassing/phpseclib,ericariyanto/phpseclib,paragonie-scott/phpseclib,phpseclib/phpseclib,thaigialai1987/phpseclib,splitice/phpseclib,melya/phpseclib,ericariyanto/phpseclib,danog/phpseclib,thaigialai1987/phpseclib,creatuity/phpseclib,kenichiii/phpseclib,metaclassing/phpseclib,phpseclib/phpseclib-php5,splitice/phpseclib,kenichiii/phpseclib,terrafrost/phpseclib,creatuity/phpseclib,melya/phpseclib,danog/phpseclib,phpseclib/phpseclib-php5