I've really had enough with this broken thing.

The only use of the timeout was to poll b_die, but net_ReadInner()
takes care of that already.

- Suppress broken and unused timeout value from net_ReadNonBlock()

- Use net_Read() instead of net_ReadNonBlock()

notification mechanism later on.
They are a lot of places that would need to be changed though.

- Validate and canonicalize source-filter address

   must be set to 1 for DVB subtitles.

and that signals never disturb our innocent blocking system call callers
(such as network I/O)

 * skins2/controls/ctrl_text.cpp: Fixed weird behaviours occurring when resizing a Text control with moving text

This is no excuse for using TCP instead of UDP/UDP-Lite when you can.

Fortunately, the harm potential of this old bug seems pretty low