Remove or improve rfn

[davelab6]

First I want to say, great work, and an excellent choice of license in the ofl here :)

However I would like to provide some feedback on the rfn part of the way the ofl is applied here:

To me, the rfn used today is too broad, since it's requiring derivatives to avoid the use of "sans" or "mono" in their name, unless they get additional permission. It also requires anyone redistributing the fonts with any modifications at all, including web subsetting, to change the name completely, so twilio won't get the credit deserved.

Since twilio is already a registered trademark, I think even removing the rfn altogether could be appropriate, but at least removing the generic pieces would be ideal.

I'm happy to hop on a call to help discuss more nuances with this