Support non-encryption protocol mode for debugging

[notlesh]

Supporting some or all of our protocols running without encryption will help us debug.

This should be done with great care so that the feature cannot make its way into production code in any way.

[despair86]

wasn't this enabled ages ago? there's even a flag for that i believe

# lokinet --debug

[despair86]

oh it's gone

[despair86]

was removed in rev 15cb49c