Update help text.

src/xdpfw_loader.c

@@ -288,7 +288,8 @@ int main(int argc, char *argv[])
     if (help)
     {
         fprintf(stdout, "Usage:\n" \
-            "--config -c => Config file location (default is /etc/xdpfw.conf).\n" \
+            "--config -c => Config file location (default is /etc/xdpfw/xdpfw.conf).\n" \
+            "--offload -o => Tries to load the XDP program in hardware/offload mode." \
             "--list -l => Print config details including filters (this will exit program after done).\n" \
             "--help -h => Print help menu.\n");