report RFD900 packets received as well as link margin estimate.
(non-zero packets received implies radio link).
Merge remote branch 'origin/development' into development
fix header selection for lsif.c
fix type cast warning on OSX.
add missing object deletion to clean target.
add missing casts for formatted output strings (was generating
warnings on Linux).
got rid of vestigal confValueGet() call in alternate code path.
Merge remote branch 'origin/development' into development