[tor-relays] snowflake prometheus metrics listen address

[Fran]

Hey there,

snowflake v2.6.1 offers a prometheus metrics endpoint `-metrics`.[1]

Unfortunately I am unable to figure out how to let it listen to 
non-localhost address:

tcp     LISTEN   0        4096                         127.0.0.1:9999 
        0.0.0.0:*       users:(("snowflake",pid=402248,fd=6))

Any ideas?

Thansk!
f.

[1] 
https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/merge_requests/142/diffs?commit_id=d932cb2744afde266795cece6c4e761d2422aded