Add Lancom default SSH hostkeys

```
SSH
 ssh-dss 27:c5:1d:9f:be:27:3d:50:d7:bf:c1:68:0b:18:97:d7
 ssh-rsa 03:56:e6:52:ee:d2:da:f0:73:b5:df:3d:09:08:54:b7
```

http://www.lancom-systems.de/download/documentation/Reference_Manual/LCOS-ADDENDUM-884-DE.pdf
