Use stun servers on port 3479 for turkmenistan

changed milestone to %Sponsor 96: Rapid Expansion of Access to the Uncensored Internet through Tor in China, Hong Kong, & Tibet

added Sponsor 96 label

requested review from @gus

assigned to @meskio

lgtm! ref: censorship-analysis#40024 (comment 2830707)

merged

Deployed, TM users now get those stun servers.

mentioned in issue censorship-analysis#40029 (closed)

mentioned in commit tpo/network-health/metrics/timeline@3589dd0e

mentioned in commit tpo/network-health/metrics/timeline@7c9a2ac7

mentioned in issue censorship-analysis#40024 (closed)