*: mass renaming of USE_XXXX to IF_XXXX
and SKIP_XXXX to IF_NOT_XXXX - the second one was especially
badly named. It was not skipping anything!

diff --git a/modutils/modutils.h b/modutils/modutils.h
index 5104f1b..8cca5cc 100644
--- a/modutils/modutils.h
+++ b/modutils/modutils.h
@@ -26,10 +26,10 @@
 
 #define INSMOD_OPTS \
 	"vq" \
-	USE_FEATURE_2_4_MODULES("sLo:fkx") \
-	USE_FEATURE_INSMOD_LOAD_MAP("m")
+	IF_FEATURE_2_4_MODULES("sLo:fkx") \
+	IF_FEATURE_INSMOD_LOAD_MAP("m")
 
-#define INSMOD_ARGS USE_FEATURE_2_4_MODULES(, NULL)
+#define INSMOD_ARGS IF_FEATURE_2_4_MODULES(, NULL)
 
 enum {
 	INSMOD_OPT_VERBOSE	= 0x0001,