This parameter added with the previous commit prevents Snowflake from
working properly.
So, we prefer to undo the addition (but keep the changes to the ICE
server list).

On Android we set PTs parameters with a patch to
tor-onion-proxy-library, but they were not updated to the same as
desktop.

We're switching from Azure to Fastly for our snowflake broker front
domain.

This updates Snowflake and the set of default stun servers used by the
Snowflake client.