Mention version when closing a report as fixed

[Glenn Morris]

When you close a bug report after fixing it, it's very helpful to give
some indication of what version the fix is in.

It's helpful to users if you indicate the first release the fix will be in.
If closing via "123-done", put "Version: 27.1" in the first line of
the body. If closing via the control server, use "close 123 27.1".

It's helpful to developers if you give the relevant commit id.
Eg just say "Fixed in abcdef".

If you only feel like doing one of these, please do the latter (because
it's easy to figure out the former after the fact using eg git describe).

Thanks!