The PSTR is already define as a NOP for all supported platforms. It's
only needed for AVR so here we remove all the uses throughout the
codebase.
This was automated with a simple python script so it also converts
places which spans to multiple lines, removing the matching parentheses.
AVR-specific places were not changed.
Restructured into case statement
Replaced use of g.throttle_max with definition
Added more comments
Send message to ground station instead of printing on console (although
probably both are unlikely to be read)
Luis Vale Gonçalves
lvale
Lucas De Marchi
squilter
Randy Mackay
Andrew Tridgell
Jonathan Challinger
Jason Short