3.3.5:
Fixed a race condition where supervisord would cancel a shutdown already in progress if it received SIGHUP. Now, supervisord will ignore SIGHUP if shutdown is already in progress.
Fixed a bug where searching for a relative command ignored changes to PATH made in environment=.
childutils.ProcessCommunicationsProtocol now does an explit flush() after writing to stdout.
A more descriptive error message is now emitted if a name in the config file contains a disallowed character.
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