Merge remote-tracking branch 'qatar/master'

* qatar/master:
  http: Add the url_shutdown function for https, too
  http: Simplify code by removing a local variable
  http: Clear the old URLContext pointer when closed
  tcp: Try enabling SO_REUSEADDR when listening
  tcp: Check the return values from bind and accept
  avisynth: Make sure the filename passed to avisynth is in the right code page

Conflicts:
	libavformat/http.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/tcp.c

@@ -83,6 +83,8 @@ static int tcp_open(URLContext *h, const char *uri, int flags)
 
     if (listen_socket) {
         int fd1;
+        int reuse = 1;
+        setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse));
         ret = bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen);
         if (ret) {
             ret = ff_neterrno();