Add further information to motd

[dl1com]

• Print further configuration parameters
  • [ ] hnap_tap_ip - will be renamed soon, wait for this to be settled
  • [ ] autostart setting (client/basestation/off)
  • [ ] Pluto frequency range unlocked? (ad9364)
• Print warnings, if critical/necessary parameters have wrong settings
  • [x] maxcpus has to be unset or 2
  • [x] isolcpus has to be 1
  • [ ] xo_correction not set - tbd, is this really worth a warning?