flight: remove warnings.
gcs: add opts to commsec-server.
commsec-gcs: refactor.
mk: unnecessary file.
make: comment for why config.mk is included here

  (it's not the "real" include).
commsec: set keys, salt, ids in Keys.mk.

  Read from the cmd line in the GCS and the flight apps.
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/flight/SMACCMPilot/Flight.hs
	src/flight/SMACCMPilot/Flight/Commsec/Commsec.hs
	src/flight/SMACCMPilot/Flight/Commsec/Decrypt.hs
	src/flight/SMACCMPilot/Flight/Commsec/Encrypt.hs
	src/flight/SMACCMPilot/Flight/GCS/Tower.hs
	src/flight/smaccmpilot.cabal
	src/gcs/commsec-gcs.cabal
	src/gcs/gcs.sh
	src/gcs/src/Commsec/CommsecServer.hs