Backend can't call tainted code that may run configd again.  This needs
to be cleaned up.  Ideally, the backend should only call python code.

Spotted by: @fabianfrz

Don't need to do anything else here for now.

Discussed with: @adschellevis

Not sure we'll ever hit this, make it more vague, although
IKE is pretty much either this or that.

Spotted by: @fabianfrz

Makes the file very light, best to be merged into misc settings.

Spotted by: @fabianfrz