[4208] Update KEA_HOOKS_VERSION to 3 in preparation for release of Kea 1.0.

src/lib/hooks/hooks.h

@@ -20,8 +20,8 @@
 
 namespace {
 
-// Version 2 of the hooks framework.
-const int KEA_HOOKS_VERSION = 2;
+// Version 3 of the hooks framework, set for Kea 1.0.
+const int KEA_HOOKS_VERSION = 3;
 
 // Names of the framework functions.
 const char* const LOAD_FUNCTION_NAME = "load";