The SIGHUP handling for the TTY windowport added in 594cb5f was wrapped
in '#ifdef HANGUP_HANDLING', but the actual define is 'HANGUPHANDLING'
without the underscore.
The SIGHUP handling for the TTY windowport added in 594cb5f was wrapped
in '#ifdef HANGUP_HANDLING', but the actual define is 'HANGUPHANDLING'
without the underscore.