Closes#4934
* light: do not compare trusted header w/ witnesses
we don't have trusted state to bisect from
* check header before checking height
otherwise you can get nil panic
fix bug so that PotentialAmnesiaEvidence is being gossiped
handle inbound amnesia evidence correctly
add method to check if potential amnesia evidence is on trial
fix a bug with the height when we upgrade to amnesia evidence
change evidence to using just pointers.
More logging in the evidence module
Co-authored-by: Marko <marbar3778@yahoo.com>