Revert "Send TCP FIN after completion of our RTSP request"

Existing servers already know how to parse our messages without this,
so we just risk breaking things with middleboxes that don't do half-closed
connections properly. We'll handle this better with encrypted RTSP.

This reverts commit 95e3e26d12.

src/PlatformSockets.h

@@ -15,8 +15,6 @@
 #define SetLastSocketError(x) WSASetLastError(x)
 #define LastSocketError() WSAGetLastError()
 
-#define SHUT_RD SD_RECEIVE
-#define SHUT_WR SD_SEND
 #define SHUT_RDWR SD_BOTH
 
 #ifdef EAGAIN

src/RtspConnection.c

@@ -267,9 +267,6 @@ static bool transactRtspMessageTcp(PRTSP_MESSAGE request, PRTSP_MESSAGE response
         goto Exit;
     }
 
-    // Notify the server that we're finished sending the request with a FIN
-    shutdown(sock, SHUT_WR);
-
     // Read the response until the server closes the connection
     offset = 0;
     responseBufferSize = 0;