Revert "control: move rehash signal to SIGUSR1, and shutdown on SIGHUP (terminal close)"
Revert "control: move rehash signal to SIGUSR1, and shutdown on SIGHUP (terminal close)"

This wasn't an incredibly popular decision because it broke a simple 'pylink &'

This reverts commit 883f9199ecf63ef91df25a5dc47d8f7d353d7af0.

Conflicts:
	coremods/control.py

GLolol/PyLink