avio: deprecate url_feof

AVIOContext.eof_reached should be used directly instead.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

ffplay.c

@@ -2568,7 +2568,7 @@ static int decode_thread(void *arg)
         }
         ret = av_read_frame(ic, pkt);
         if (ret < 0) {
-            if (ret == AVERROR_EOF || url_feof(ic->pb))
+            if (ret == AVERROR_EOF || ic->pb->eof_reached)
                 eof=1;
             if (url_ferror(ic->pb))
                 break;