[arch-general] changelogs (was Re: postgresql 9.3 -> 9.4)

[Carl Schaefer]

The thread about the postgresql update reminded me of one of the few
things about Ubuntu that I miss: package updates usually included a
useful changelog entry describing what was fixed and/or new.  Perhaps I
assume too much, but I imagine Arch package maintainers would generally
be aware of the changes in an update they're making, and so it wouldn't
be much additional work to include that information in a changelog
entry.

When I first started using Arch I'd hoped "pacman -Qc" would do this,
but at this point only three of the 867 packages on my system have a
changelog, and most of those entries are just "version bump" or
equivalent.
Carl