Back out use of ip.h IPTOS_DSCP_AF42 constant (missing on OS X)

src/network/network.cc

@@ -35,7 +35,6 @@
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
-#include <netinet/ip.h>
 #include <arpa/inet.h>
 #include <assert.h>
 #include <errno.h>
@@ -158,7 +157,7 @@ Connection::Socket::Socket()
 #endif
 
   /* set diffserv values to AF42 + ECT */
-  int dscp = IPTOS_DSCP_AF42 | IPTOS_ECN_ECT0;
+  int dscp = 0x92; /* OS X does not have IPTOS_DSCP_AF42 constant */
   if ( setsockopt( _fd, IPPROTO_IP, IP_TOS, &dscp, sizeof (dscp)) < 0 ) {
     //    perror( "setsockopt( IP_TOS )" );
   }