I have built a port for turnserver-4.5.0.3, https://github.com/coturn/coturn.
It needs an experienced maintainer to complete and verify. I have tested the port and am running the results on openBSD 5.9 stable. There is a reported dependency problem but it does not seem to affect the operation of the sub app involved. The license seems to be a scaled down version of some other license, but requires the license file to be included in any distribution. This app has been ported on FreeBSD.
turnserver_port.tgz
Description: application/compressed
