Overrides for confidence thresholds on different query IDs

[0xSpuddy]

Recently the DVM has been pushing alterts on gas price submissions. The issue here is that gas price is simply much more volatile than any spot price query ID. We should be able to set a confidence threshold override for more volatile query IDs.

For example, a confidence threshold of 10% (-c 0.10) for alerts on all query IDs unless it's ID 0x48e9e2c732ba278de6ac88a3a57a5c5ba13d3d8370e709b3b98333a57876ca95 (gas price) then use 25% confidence threshold (-c 0.25) simply because gas price is so volatile. Gas price can increase 2x in less than a minute when the network is busy.

Does this sound like a good idea? bad idea?