Replace index_in_[sub]str_array with index_in_[sub]strings,
which scans thru "abc\0def\0123\0\0" type strings. Saves 250 bytes.

   text    data     bss     dec     hex filename
 781266    1328   11844  794438   c1f46 busybox_old
 781010    1328   11844  794182   c1e46 busybox_unstripped

diff --git a/networking/udhcp/dumpleases.c b/networking/udhcp/dumpleases.c
index fb50d68..f9f9231 100644
--- a/networking/udhcp/dumpleases.c
+++ b/networking/udhcp/dumpleases.c
@@ -28,7 +28,7 @@
 		"absolute\0"  No_argument       "a"
 		"remaining\0" No_argument       "r"
 		"file\0"      Required_argument "f"
-		"\0";
+		;
 
 	applet_long_options = dumpleases_longopts;
 #endif