Changes

ReturnFromMoon: change periapsis constraint

removing normalization makes it converge much faster.

slight impact on accuracy but cuts the time by over 50%.

also add an always-on-optguard test so i make sure not to screw up the
jacobians.

Signed-off-by: Lamont Granquist <lamont@scriptkiddie.org>
 (commit: bf9e8dc)