I am upgrading my server (8.x to 9.1) and I know that before doing this all added contribs have to be removed to ensure a smooth update.
I vaguely remember that there was a command to list all added contribs, but I cannot recall what it was, and despite a lot of searching the wiki, I cannot find it.
Can anyone remind me, or if my memory is defective, offer any suggestions for getting a list of contribs to remove pre-upgrade?
Many thanks, Barry.