Logging framework update and mass Log::ID renaming.

- Log path's are generated in the scripting land
  now.  The default Log stream ID to path string
  mapping works like this:
    - Notice::LOG -> "notice"
    - Notice::POLICY_LOG -> "notice_policy"
    - TestModule::LOG -> "test_module"

- Logging streams updated across all of the shipped
  scripts to be more user friendly.  Instead of
  the logging stream ID HTTP::HTTP, we now have
  HTTP::LOG, etc.

- The priorities on some bro_init handlers have
  been adjusted to make the process of applying
  filters or disabling streams easier for users.

scripts/base/frameworks/cluster/main.bro

@@ -3,7 +3,8 @@
 module Cluster;
 
 export {
-	redef enum Log::ID += { CLUSTER };
+	redef enum Log::ID += { LOG };
+	
 	type Info: record {
 		ts:       time;
 		message:  string;
@@ -106,5 +107,5 @@ event bro_init() &priority=5
 		terminate();
 		}
 	
-	Log::create_stream(CLUSTER, [$columns=Info]);
+	Log::create_stream(Cluster::LOG, [$columns=Info]);
 	}