Patch for /unix/xdq.c

```
Added Numlock (Mod2) to modifiers
```

Original issue reported on code.google.com by `colinmki...@gmail.com` on 26 Feb 2014 at 3:07

Attachments:
- [xdq.c.patch](https://storage.googleapis.com/google-code-attachments/dvorak-qwerty/issue-5/comment-0/xdq.c.patch)
