Sanitize paths for SSH data#1712

MarkEWaite merged 1 commit intojenkinsci:stable-6.4jenkinsci/git-client-plugin:stable-6.4from

MarkEWaite:avoid-percent-in-ssh-filename-argsMarkEWaite/git-client-plugin:avoid-percent-in-ssh-filename-argsCopy head branch name to clipboard