Fix SIGHUP signal on Windows
Fix SIGHUP signal on Windows


Former-commit-id: aef35fd7e8a49d412e350fcac6ce5d316e741f4f [formerly d2d28bec40eea23ece77974f36dab086a1c49c8d]
Former-commit-id: cf8a785c10baac91ecdf013192b2ad123e2a6341
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine