fix option -F mishandling
diff --git a/networking/hostname.c b/networking/hostname.c
index 7116a14..45aaaa4 100644
--- a/networking/hostname.c
+++ b/networking/hostname.c
@@ -48,7 +48,7 @@
 		OPT_f = 0x2,
 		OPT_i = 0x4,
 		OPT_s = 0x8,
-		OPT_F = 0x8,
+		OPT_F = 0x10,
 		OPT_dfis = 0xf,
 	};