Erm, no they aren't in the upgrade guide, because the upgrade guide is aimed
at user issues and this was seen primarily as an extension author issue. Do
people generally think the module and extension API bumps should be in
there?
Rasmus was talking about the internals change and ask if they can be
put in this file. I think it is a very good suggestion and no, I did
not have the time (and will not in the next 10 days) to do it :)
And a FYI, the documentation team has decided to create migration pages for minor releases of PHP and will use these README files as a base for this documentation. Before only major versions were documented this way. All should feel free to contribute to these docs :-)
Regards,
Philip