Implement a custom prometheus http handler in order to:
1. Support listening on a specified address as opposed to any
2. Remove the requirement on the unmaintained promhttp library
This feature comes with one limitation: if an IPv4 address is used, the
server will not listen on the IPv6-mapped address, even if IPv6 is
available. That is, dual-stacking does not work.
Solves: #1475
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Co-authored-by: Pavel Punsky <eakraly@users.noreply.github.com>
Fixes#1533 and #1534
Memsetting `turn_params.default_users_db` before reading conf file, not
after.
Because auth is read in first iteration so secret was wiped out.
# test plan
Add new test script that uses config file to setup turnserver instead of
cli arguments and confirm it works (fails without the change)
MacOS CI build started to fail in the PRs because when upgrading python
it was not possible to override one existing file (related to 2to3
package). Apparently this happens because MacOS runners some times have
python versions not installed/compatible with brew.
Example of the failure:
https://github.com/coturn/coturn/actions/runs/3850951324
The proposed workaround is taken from here:
https://github.com/actions/runner-images/issues/2322
