detect/transform: Register case-change transforms

Issue: 6439

src/detect-engine-register.c

@@ -245,6 +245,7 @@
 #include "detect-transform-pcrexform.h"
 #include "detect-transform-urldecode.h"
 #include "detect-transform-xor.h"
+#include "detect-transform-casechange.h"
 
 #include "util-rule-vars.h"
 
@@ -701,6 +702,8 @@ void SigTableSetup(void)
     DetectTransformPcrexformRegister();
     DetectTransformUrlDecodeRegister();
     DetectTransformXorRegister();
+    DetectTransformToLowerRegister();
+    DetectTransformToUpperRegister();
 
     DetectFileHandlerRegister();