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.
Instrument testEqInt() macro with caller's source line-number.
Added another epicsEvent to wait for the listeners to run.
Not guaranteed to fix all issues, but should be more reliable.
