upnp: Switch to an unlimited maximum content length

Use INT_MAX as the maximum content length as libupnp introduced 0 as an
unlimited content length in pupnp 1.6.7, though UPNP_VERSION was not bumped.
(cherry picked from commit 794557ee)
(cherry picked from commit 75a40b63)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/services_discovery/upnp.cpp

@@ -38,6 +38,7 @@
 #include <vlc_services_discovery.h>
 
 #include <assert.h>
+#include <limits.h>
 
 /*
  * Constants
@@ -136,6 +137,18 @@ static int Open( vlc_object_t *p_this )
         return VLC_EGENERIC;
     }
 
+    /* libupnp does not treat a maximum content length of 0 as unlimited
+     * until 64dedf (~ pupnp v1.6.7) and provides no sane way to discriminate
+     * between versions */
+    if( (i_res = UpnpSetMaxContentLength( INT_MAX )) != UPNP_E_SUCCESS )
+    {
+        msg_Err( p_sd, "Failed to set maximum content length: %s",
+                UpnpGetErrorMessage( i_res ));
+
+        Close( (vlc_object_t*) p_sd );
+        return VLC_EGENERIC;
+    }
+
     return VLC_SUCCESS;
 }