request additional api functions for enabling/disabling rules and controls nondestructively

[samhatchett]

The new rules/controls API functions are great - however in my application I have a need to be able to selectively enable and disable these rules/controls individually after load-time without removing them entirely.

I have example code that could enter into a PR.

[eladsal]

So you will add a new property for a rule\control, like active?

[samhatchett]

that's right - it would be a new property on those structures to signify whether it is enabled. The enabled/disabled state would not be saved in any way into an INP file however - I suppose the default of "enabled" would ensure backwards compat.