Force re-refresh if plugin listing is being refreshed indefinately.
This attempts to prevent the failure to update the listed plugins that occasionally happens.
Correct for malformed Openfire plugin query.
As observed in the logs, something is performing queries with a malformed path,
like this: /projects/openfire;/plugins/1.2.2-SNAPSHOT/userstatus/readme.html
We're correcting for that in this commit.
