(bug 45323) preference tab "OpenID" adds a list of "trust" records

= list of "consumer" domains and services for which the user
allowed to use their MediaWiki OpenID

This patch enables users - for the first time - to list their "consumer"
domains and services. Where they allow to use their MediaWiki OpenID.

The information is stored in the OpenID Server when one adds
the OpenID at the Consumer site.

Change-Id: Id2d1a0710f698d904e339ed194be6494937ceb5d