Fix label in srcleaner

This was causing srcleaner and srworker to conflict with each other on
os x, meaning only one of them would run at a time. *facepalm*
Handle exceptions better in enqueuer

We don't care too much, so just swallow them. People will complain at me
if their "pushed" jobs don't get run (eventually).
Attempt to make queue listeners recover from connection failures

This may or may not work (according to pika's github account), but it's
worth having around.
Watchdog process for windows

In case the worker fails somehow, this will restart it infinitely
Fix lint warnings in archiver
Fix lint warnings in cloner
Fix lint warnings in collator
Fix lint warnings in deferrer
Fix lint warnings in dns daemon
Fix lint warnings in dns updater
Fix lint warnings in downloader
Fix lint warnings in info gatherer
Fix lint warnings in master
Fix lint warnings in named
Fix lint warnings in reporter
Fix lint warnings in runner
Fix lint warnings in scheduler
Fix lint warnings in unpacker
Fix lint warnings in uploader
Fix lint warnings in worker