- Use strlcpy()

Might be a better idea to implement strlcpy()

- Clean up

* Fix for some strange x drivers that return 8 bits screens as first answer when being requested a Truecolor class one

in any case (however unlikely we were to fall far it on Linux)

* Instead, use "screensaver,none" when trying to load the screensaver interface
* Same fix for onther interfaces loaded by libvlc

Fix #525 Fixes #525

- Close-on-exec: Don't leak httpd client sockets into CGI scripts or
  whatever child process we spawn.

work like any other one: it's actually thirty two times as big than the
POSIX ones for any given FD_SETSIZE, plus FD_SET and FD_ISSET are O(n)
instead of O(1). But at least, the mingw implementations of FD_SET has
built-in overflow checks.

Also, Winsock insists on returning big socket numbers, so we can't drop
those above FD_SETSIZE or we have no TCP/IP support at all, anyway.