Nomad Network beta 0.6.0

This update adds new configuration options to nodes running LXMF PNs, and updates the required LXMF version to `0.6.1` for better memory utilisation.

**Changes**
- Added ability to configure LXMF PN `max_peers` and `static_peers`
- Updated required RNS to `0.9.1` and LXMF to `0.6.1`