Bump GPLv2+ to GPLv3+ for some files, clarify BSD 2-clause.
Everything else stays under GPLv3+.
New Linking Exception exempts resulting executables from LGPLv3 section 4.
Add CONTRIBUTORS file to keep track of licensing.
Remove 'Copyright Red Hat Inc' comments.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
(forkrectest): Expect child success.
(forkplaytest): Ditto.
(syncwithchild): Output the child status and the desired value.
(sinegenw): Reduce volume of the beep.
(sinegenb): Ditto.
(dup_test): New test.