Add default HUP signal handling for child process.

Author: ioquatix

examples/minimal.rb

@@ -61,7 +61,7 @@ def initialize(&block)
 
 		@pid = Process.fork do
 			Signal.trap(:INT) {::Thread.current.raise(Interrupt)}
-			Signal.trap(:INT) {::Thread.current.raise(Terminate)}
+			Signal.trap(:TERM) {::Thread.current.raise(Terminate)}
 
 			@channel.in.close
 

lib/async/container/process.rb

@@ -68,6 +68,7 @@ def self.fork(**options)
 						# We use `Thread.current.raise(...)` so that exceptions are filtered through `Thread.handle_interrupt` correctly.
 						Signal.trap(:INT) {::Thread.current.raise(Interrupt)}
 						Signal.trap(:TERM) {::Thread.current.raise(Terminate)}
+						Signal.trap(:HUP) {::Thread.current.raise(Hangup)}
 
 						# This could be a configuration option:
 						::Thread.handle_interrupt(SignalException => :immediate) do