Merge branch 'robin/topic/writer-info'

* robin/topic/writer-info:
  Extending the log writer DoInit() API.
  Reworking log writer API to make it easier to pass additional information to a writer's initialization method.

Conflicts:
	src/logging/WriterBackend.cc
	src/logging/WriterBackend.h
	src/logging/WriterFrontend.cc

scripts/base/frameworks/logging/__load__.bro

@@ -2,3 +2,4 @@
 @load ./postprocessors
 @load ./writers/ascii
 @load ./writers/dataseries
+@load ./writers/none

scripts/base/frameworks/logging/main.bro

@@ -138,6 +138,11 @@ export {
 		## Callback function to trigger for rotated files. If not set, the
 		## default comes out of :bro:id:`Log::default_rotation_postprocessors`.
 		postprocessor: function(info: RotationInfo) : bool &optional;
+
+		## A key/value table that will be passed on to the writer.
+                ## Interpretation of the values is left to the writer, but
+                ## usually they will be used for configuration purposes.
+                config: table[string] of string &default=table();
 	};
 
 	## Sentinel value for indicating that a filter was not found when looked up.
@@ -327,6 +332,8 @@ function __default_rotation_postprocessor(info: RotationInfo) : bool
 	{
 	if ( info$writer in default_rotation_postprocessors )
 		return default_rotation_postprocessors[info$writer](info);
+
+	return F;
 	}
 
 function default_path_func(id: ID, path: string, rec: any) : string

scripts/base/frameworks/logging/writers/none.bro

@@ -0,0 +1,17 @@
+##! Interface for the None log writer. Thiis writer is mainly for debugging.
+
+module LogNone;
+
+export {
+	## If true, output debugging output that can be useful for unit
+        ## testing the logging framework.
+	const debug = F &redef;
+}
+
+function default_rotation_postprocessor_func(info: Log::RotationInfo) : bool
+	{
+	return T;
+	}
+
+redef Log::default_rotation_postprocessors += { [Log::WRITER_NONE] = default_rotation_postprocessor_func };
+