Merge remote branch 'qatar/master'

* qatar/master:
  proto: include os_support.h in network.h
  matroskaenc: don't write an empty Cues element.
  lavc: add a FF_API_REQUEST_CHANNELS deprecation macro
  avio: move extern url_interrupt_cb declaration from avio.h to url.h
  avio: make av_register_protocol2 internal.
  avio: avio_ prefix for url_set_interrupt_cb.
  avio: AVIO_ prefixes for URL_ open flags.
  proto: introduce listen option in tcp
  doc: clarify configure features
  proto: factor ff_network_wait_fd and use it on udp

Conflicts:
	ffmpeg.c

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

libavformat/utils.c

@@ -32,6 +32,7 @@
 #include "libavutil/avstring.h"
 #include "riff.h"
 #include "audiointerleave.h"
+#include "url.h"
 #include <sys/time.h>
 #include <time.h>
 #include <strings.h>
@@ -636,7 +637,7 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
        hack needed to handle RTSP/TCP */
     if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
         /* if no file needed do not try to open one */
-        if ((err=avio_open(&pb, filename, URL_RDONLY)) < 0) {
+        if ((err=avio_open(&pb, filename, AVIO_RDONLY)) < 0) {
             goto fail;
         }
         if (buf_size > 0) {