Removed completed TODO, README tweak.

Author: shazow

README.md

@@ -44,7 +44,7 @@ client$ ssh $SERVER "hello world"
 hello world
 ```
 
-Echo host's environment to clients
+Echo host's environment to clients (with accept-all auth):
 
 ```
 server$ execd -e $(which true) $(env)

handlers.go

@@ -89,7 +89,6 @@ func (h *sshHandler) Exit(err error) error {
 }
 
 func (h *sshHandler) Request(req *ssh.Request) {
-	// TODO: Add mutex?
 	switch req.Type {
 	case "exec":
 		h.handleExec(req)