Just went to https://www.allegro.cc/manual/5 and saw blank pages instead of every function and variable reference. What's wrong?
Luckily, the PDF is still viewable.
The docs are also available here, except that SourceForge is down right now 
Hmm, maybe there's a connection? (the actual data may be hosted on SF)
The member profile pages have been down for awhile now, too. 
The docs have always been available under http://docs.liballeg.org
[edit:]
Which normally points to liballeg.org, which is down now since SF is down... so for now I changed it to point to a temporary location.
So that's what that file was for. 
Manual pages should be back up.
Yay, the a.cc manual works as expected now.
Well, almost. For example, https://www.allegro.cc/manual/5/allegro_event works but https://www.allegro.cc/manual/5/allegro_event_joystick_axis gives a 404, although there seems to be a corresponding entry on the former page.
But that was the case before, too, if I remember correctly.
All the Allegro events seem to be missing. Was gonna refresh my memory on the mouse events but they weren't there.
You're just better off using the official docs.
Indeed, I was able to locate what I needed in the other archive, though I wasn't under the impression one was more "official" than the other.
Either way we can at least inform the right people when a page is missing 
The docs on docs.liballeg.org are the official ones. allegro.cc's are convenient, that are often out of date, and sometimes broken.