Fix some typos.

Some code copied and pasted without updating the variable names was
causing crashes.

rlgwebd.js

@@ -391,7 +391,7 @@ function logout(term, res) {
     sendError(res, 1, null);
     return;
   }
-  cterm.close();
+  term.close();
   var resheaders = {'Content-Type': 'text/plain'};
   res.writeHead(200, resheaders);
   res.write(JSON.stringify({"t": "q"}));