[encrypt_ppz] try headerdev a few more times before prompt
consolidate test_network functions
remove unused bash functions: sleepinc() wait-for-network()
ditch integrity_net()

testing the network in integrity is really annoying, and actually useless. i don't even use any of this stuff.
ditch python-ntp

it's a nice idea but never in all these years have i both seen it fail and acted on that.
ntpd works fine and systemd-journal makes it easy to keep tabs on it.
having this in integrity also leaked information to the network on what i'm doing, which is minor but never a good thing.
[sshr] new script for reverse ssh tunnels

enable the service on any machine, and you can always talk to it whenever it's on a good network, through a third cloud server somewhere