Fix specialstr arrray content.
Fix SUMD byte order.
Merge branch 'master' into 19-bcom-in-c
Add SUMD output
Move SBUS/Spektrum/SUMD into one file (for shared variables)
Add SUMD to RX config.
Merge branch 'master' into 19-bcom-in-c
Merge branch '19-bcom-in-c' into 20-standalone
Merge branch '20-standalone' into 21-bool