Comment 2 for bug 800505

I don't yet, but I can offer the direction:

Translate phpmyadmin.conf from Apache config to nginx config and save it.

(Perhaps as ehcp/etc/nginx/phpmyadmin.nginx)

Then add in the server section of apachetemplate.nginx add the following line:

include phpmyadmin.nginx

Not sure about how to do the translation yet though. If someone else knows nginx and can crank it out, great. Otherwise, I'll figure it out eventually and post it here.