Adds tests to ensure that a record's special() routine can
return an error status that gets fed back to the client from
both before and after special() calls.
This was broken from 3.15 through 7.0.5 inclusive.
In some cases the license-identification header was missing,
so I added that as well. Replaced the remaining headers that
specifically identified "Versions 3.13.7 and higher".
Makefiles and the build system were deliberately excluded.
