[PATCH 1 of 5 V2] obsolete: add isenabled function for option checking

[Durham Goode]

On 10/15/14 1:37 PM, Pierre-Yves David wrote:
>
>
> On 10/15/2014 01:03 PM, Durham Goode wrote:
>> # HG changeset patch
>> # User Durham Goode <durham at fb.com>
>> # Date 1413317855 25200
>> #      Tue Oct 14 13:17:35 2014 -0700
>> # Node ID a22ff14b5ff64123d37e1fc42cad86cf76a4c3b1
>> # Parent  75d0edb68b417964110e3fcd69187c867f31a119
>> obsolete: add isenabled function for option checking
>
> I'll probably push this series later today after a renames of 
> `experimental.obsoleteoptions` to `experimentation.evolution` and some 
> tests addition.
>
> CCing Matt to give him time for growling if applicable.
>
This was pushed to the clowncopter after Pierre-Yves did an over the 
shoulder review (along with tests). We have not removed 
obsolete._enabled, but will do that once the mutable-history repo 
supports the new option flags.