Uncomment MySQL port in default configs.

This ensures that host:port is used rather than an empty address,
which defaults to 127.0.0.1:3306 (ignoring the host in the config).

conventional.yaml

     mysql:
         enabled: false
         host: "localhost"
-        # port is unnecessary for connections via unix domain socket:
-        #port: 3306
+        port: 3306
         # if socket-path is set, it will be used instead of host:port
         #socket-path: "/var/run/mysqld/mysqld.sock"
         user: "oragono"

oragono.yaml

     mysql:
         enabled: false
         host: "localhost"
-        # port is unnecessary for connections via unix domain socket:
-        #port: 3306
+        port: 3306
         # if socket-path is set, it will be used instead of host:port
         #socket-path: "/var/run/mysqld/mysqld.sock"
         user: "oragono"