help systemd by not calling shutdown() on listen socket if MHD_USE_PIPE_FOR_SHUTDOWN is given

ChangeLog

@@ -1,3 +1,7 @@
+Tue Sep 22 19:17:54 CEST 2015
+	Do not use shutdown() on listen socket if MHD_USE_PIPE_FOR_SHUTDOWN
+	is set. -CG
+
 Wed Sep 16 11:06:02 CEST 2015
 	Releasing libmicrohttpd 0.9.43. -CG
 

doc/libmicrohttpd.texi

@@ -542,6 +542,10 @@ use of this option is automatic (as in, you do not even have to
 specify it), if @code{MHD_USE_NO_LISTEN_SOCKET} is specified.  In
 "external" select mode, this option is always simply ignored.
 
+Using this option also guarantees that MHD will not call
+@code{shutdown()} on the listen socket, which means a parent
+process can continue to use the socket.
+
 @item MHD_USE_SUSPEND_RESUME
 Enables using @code{MHD_suspend_connection} and
 @code{MHD_resume_connection}, as performing these calls requires some

src/include/microhttpd.h

@@ -130,7 +130,7 @@ typedef intptr_t ssize_t;
  * Current version of the library.
  * 0x01093001 = 1.9.30-1.
  */
-#define MHD_VERSION 0x00094300
+#define MHD_VERSION 0x00094301
 
 /**
  * MHD-internal return code for "YES".

src/microhttpd/daemon.c

@@ -2223,7 +2223,7 @@ MHD_run_from_select (struct MHD_Daemon *daemon,
   struct MHD_Connection *next;
   unsigned int mask = MHD_USE_SUSPEND_RESUME | MHD_USE_EPOLL_INTERNALLY_LINUX_ONLY |
     MHD_USE_SELECT_INTERNALLY | MHD_USE_POLL_INTERNALLY | MHD_USE_THREAD_PER_CONNECTION;
- 
+
   /* Resuming external connections when using an extern mainloop  */
   if (MHD_USE_SUSPEND_RESUME == (daemon->options & mask))
     resume_suspended_connections (daemon);
@@ -4500,7 +4500,8 @@ MHD_stop_daemon (struct MHD_Daemon *daemon)
   else
     {
       /* fd might be MHD_INVALID_SOCKET here due to 'MHD_quiesce_daemon' */
-      if (MHD_INVALID_SOCKET != fd)
+      if ( (MHD_INVALID_SOCKET != fd) &&
+           (0 == (daemon->options & MHD_USE_PIPE_FOR_SHUTDOWN)) )
 	(void) shutdown (fd, SHUT_RDWR);
     }
 #endif