gevent registers a pthread_atfork handler that never yields. Any
subprocess.Popen/run call in a uWSGI greenlet hangs indefinitely at
fork() before the child process even starts.
- dispatcharr/gevent_patch.py: new; monkey.patch_all() + psycogreen,
loaded via uWSGI import= in all four ini files
- live_proxy/input/manager.py: posix_spawn + _SpawnedProcess; removed
dead forwarder code
- live_proxy/input/http_streamer.py: O_NONBLOCK on relay pipe + EAGAIN
retry (blocking write to a full pipe stalls the gevent hub)
- live_proxy/utils.py: new posix_spawn_proc() helper with O_NONBLOCK
stdin, shared by both output managers
- live_proxy/output/fmp4/manager.py, output/profile/manager.py:
posix_spawn_proc(); _write_all() treats EAGAIN (None) as cooperative
select.select wait instead of fatal error
- core/views.py (stream_view): posix_spawn; fixed pre-existing bug
where return StreamingHttpResponse(...) was indented inside
stream_generator, making the success path always return None
- connect/handlers/script.py: _posix_run() with posix_spawn +
cooperative select reads + non-blocking waitpid; fixes deadlock when
a script integration fires on a uWSGI-context event (client_connect
fires in the live proxy, not Celery)
