Ironically, I ran into this same exact issue today, and I have investigated the `files_preserve` param, with no luck. I'm not too familiar with the internals here, but from what I can tell it works with FileHandler, but not the SysLogHandler. 

If you try to add the syslog handler to the files_preserve list it has no effect. It seems to need a stream, and SysLogHandler doesn't have the stream attribute.

# This works for FileHandler's
log = logging.getLogger('MyLog')
fh = logging.FileHandler('/some/file')

with daemon.DaemonContext(files_preserve=[fh.stream, ]):
   log.warn("In the belly of the beast.")