Add missing include

src/include/socket.h

@@ -25,9 +25,10 @@
 
 #include <config.h>
 
-#include <sys/time.h>
+#include <sys/socket.h>
 #include <netdb.h>
 #include <netinet/in.h>
+#include <sys/time.h>
 
 #include <string>
 #include <exception>