Posting to rooms using the room alias fails

Posting to rooms using the room alias fails

```
% curl -d "test" "http://localhost:9000/#roomalias:my-matrix-server.de" 
join failed: Unrecognized request%
```

```
% curl -d "test" "http://localhost:9000/\#roomalias:my-matrix-server.de" 
join failed: No known servers% 
```