This commit changes the upstream repo location to:
https://gitlab.com/yawning/obfs4.git
Additionally all the non-`main` sub-packages now have an import
comment annotation. As a matter of courtesy, I will continue to
push to both the existing github.com and git.torproject.org repos
for the foreseeable future, though I reserve the right to stop
doing so at any time.
Unless you have very good reason to do so, there should be no reason to
actually call these ever, since the log messages are only generated if
they will result in output being written to a log file.
