STDIN/STDOUT control plugin

[Benoit Steiner]

Samuel Hocevar wrote:

> replaced all printf calls with intf_Msg calls, because printf isn't
> thread-safe. And all output starts with "rc: " so that one knows who's

All the IOs are (or at least should be, there can be a few limitations
on exotic calls) thread safe, since we are compiling with -D_REENTRANT.
That's true at least on Linux, HP, Solaris. As far as I know, if the
right #define is used, that's also true on BeOS and Win32.

Benoit