Fix for compiling.  This change can be sent upstream

--- libproxy-master/libproxy/modules/config_gnome3.cpp	Sat Sep  7 04:14:17 2013

+++ libproxy-master/libproxy/modules/config_gnome3.cpp	Mon May 11 17:56:50 2015

@@ -25,6 +25,7 @@

 #include <sys/stat.h>     // For stat()

 #include <unistd.h>       // For pipe(), close(), vfork(), dup(), execl(), _exit()

 #include <signal.h>       // For kill()

+#include <string.h>       // For memset()

 #include "../extension_config.hpp"

 using namespace libproxy;