Make #plugin "wiki by default"

[Mittineague]

Was it intentional to have closed topics wikified? eg.

Official Advertising / Ad Plugin for Discourse

Summary: Set up advertisements on Discourse GitHub: https://github.com/discourse/discourse-adplugin Install: Follow the plugin installation guide. Features IF YOU ARE RUNNING AN AD BLOCKER RIGHT NOW YOU WILL HAVE A VERY BAD TIME TRYING TO SET THIS UP! TURN IT OFF BEFORE PROCEEDING DOWN THIS PATH! You’ve been warned. This is the officially supported Discourse ad plugin. Install and configure it to start serving ads on your Discourse forum. The plu…