Standardize on the vi editing directives being on the first line.
diff --git a/networking/udhcp/packet.c b/networking/udhcp/packet.c
index 1bdade7..67a452d 100644
--- a/networking/udhcp/packet.c
+++ b/networking/udhcp/packet.c
@@ -1,3 +1,4 @@
+/* vi: set sw=4 ts=4: */
 #include <unistd.h>
 #include <string.h>
 #include <netinet/in.h>