fixed serpent-lord affliction attack line

moved it to recklessness got. it was in the imp attack triggers for some
reason.
Fixed overdrive handling
new toggle 'tdp' to toggle prompt display
Decrease recklessness check times
removed blood betrayal from can_overdrive since it doesn't last long
Background color for shouts has been fixed
Here we go, 10.0!
Merge remote-tracking branch 'upstream/pre-release' into pre-release

Conflicts:
	scripts/vitals/misc.lua