Merge branch 'development' of github.com:mikebrady/shairport-sync into development

Add code to clear pending flushes from a connection whn a new buffered audio processor is created.

RELEASENOTES-DEVELOPMENT.md

@@ -1,3 +1,8 @@
+Version 5.0-dev-93-g1417cd6f
+==
+**Bug Fix**
+* Ensure old flush requests are deleted when a new play session starts. Thanks to [saujanyashah](https://github.com/saujanyashah) for the [report](https://github.com/mikebrady/shairport-sync/issues/2107).
+
 Version 5.0-dev-87-ge12a3ed7
 ==
 **Updates -- This is Significant**

rtp.c

@@ -2373,6 +2373,15 @@ void *rtp_buffered_audio_processor(void *arg) {
 
   conn->incoming_ssrc = 0; // reset
   conn->resampler_ssrc = 0;
+
+  // turn off all flush requests that might have been pending in the connection. Not sure if this is right...
+  unsigned int fr = 0;
+  for (fr = 0; fr < MAX_DEFERRED_FLUSH_REQUESTS; fr++) {
+    conn->ap2_deferred_flush_requests[fr].inUse = 0;
+    conn->ap2_deferred_flush_requests[fr].active = 0;
+  }
+  conn->ap2_immediate_flush_requested = 0;
+
   pthread_cleanup_push(rtp_buffered_audio_cleanup_handler, arg);
 
   pthread_t *buffered_reader_thread = malloc(sizeof(pthread_t));