fix paths in 'auth' 's usage output.
remove some obvious unneeded crud from the "minimal" auth build.    more can go, but this is a start.
This frees enough ram that the 'auth' command no longer reports out of memory errors when run.
the "rgbled rgb X X X" command was broken, and would set green when you asked for red, and blue when you asked for green, and never set red.   - off by 1 error in parameter numbering.