GH-379: move catch-and-release and unified2 scripts to policy/

These are no longer loaded by default due to the performance impact they
cause simply by being loaded (they have event handlers for commonly
generated events) and they aren't generally useful enough to justify it.

scripts/base/frameworks/netcontrol/main.zeek

@@ -10,11 +10,11 @@
 ##! provides convenience functions for a set of common operations. The
 ##! low-level API provides full flexibility.
 
-module NetControl;
-
 @load ./plugin
 @load ./types
 
+module NetControl;
+
 export {
 	## The framework's logging stream identifier.
 	redef enum Log::ID += { LOG };