www/mediawiki deletion not mentioned in UPDATING

[Mike Brown]

Last month, I upgraded my www/mediawiki installation, so I ended up with 
version 1.19.x.

Now (after updating my ports tree), I want to upgrade my installation again, 
mainly just to pick up a patch to one of its dependencies, but portmaster 
won't do it; it's telling me that www/mediawiki was recently deleted, moved to 
mediawiki-119. Nothing was written about this in UPDATING. Please consider 
this message a request to mention it.

I'm asking about this because it's not entirely clear to me what I'm supposed 
to do in order to properly do the upgrade. I'm guessing I could do this:

portmaster -o www/mediawiki-119 www/mediawiki

Would that be sufficient? Anything I should watch out for?

What if I want to upgrade to www/mediawiki-120? Should I do that afterward?

Thanks