hg-ssh: use shlex for shell-like parsing of SSH_ORIGINAL_COMMAND The Mercurial ssh protocol is defined as if it was ssh-ing to a shell account on an ordinary ssh server, and where hg was available in $PATH and it executed the command "hg -R REPOPATH serve --stdio". The Mercurial ssh client can in most cases just pass REPOPATH to the shell, but if it contains unsafe characters the client will have to quote it so the shell will pass the right -R value to hg. Correct quoting of repopaths was introduced in d8fa35c28335 and tweaked in 86fc364ca5f8. hg-ssh doesn't create the command via a shell and used a simple parser instead. It worked fine for simple paths without any quoting, but if any kind of quoting was used it failed to parse the command like the shell would do it. This makes hg-ssh behave more like a normal shell with hg in the path would do.