Feature Request: Long Term Credential

[iamdoubz]

Add ability to use existing coturn server by supporting another variable TURN_LTC which would use a predefined long turn credential.

[kern]

Happy to accept a PR for this

[iamdoubz]

I am working on it. Hope to have it done by tomorrow. I am testing it locally right now.

[iamdoubz]

Forgive me if I made the code a mess, but I was able to get the long term credential working and also added a couple other customizations while I was in there @kern #261 is available for your viewing pleasure...