Avoid daemon creation

[boussou]

I often noticed there are remaining processes that become deamons at the event the terminal window lost connexion. I think it was never the case in the earlier versions of redir (not sure about this)

case:

• you get redir active on some port
• you brutally close the connection ( laptop to sleep, close the term window)

would it be possible to listen to signal() & avoid that kind of situation?

[troglobit]

The double forking (detaching) of children was part of Sam's original implementation. The idea, from what I can tell, is to keep the code as simple as possible. I guess before that change, in 9da9b3c, they likely had problems with zombies instead. With fully detached children there no longer exist any bond between the processes.

It's quite a lot of work to fix and retest this, but patches are welcome.