* Refactor SSH init code, fix directory creation for TrustedUserCAKeys file * Update modules/ssh/init.go Co-authored-by: zeripath <art27@cantab.net> * fix lint copyright * Update modules/ssh/init.go Co-authored-by: zeripath <art27@cantab.net> Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>