Better support for custom logging.

lib/new_relic/control.rb

@@ -68,7 +68,11 @@ def init_plugin(options={})
       @settings = nil
 
       options.each { |sym, val | self[sym.to_s] = val unless sym == :config }
-      @log = logger_override if logger_override
+      if logger_override
+        @log = logger_override
+        # Try to grab the log filename
+        @log_file = @log.instance_eval { @logdev.filename rescue nil }
+      end
       init_config(options)
       if agent_enabled? && !@started
         setup_log unless logger_override
@@ -369,10 +373,6 @@ def log_path
       File.expand_path(path)
     end
 
-    def log_file_name
-      @log_file
-    end
-
     # Create the concrete class for environment specific behavior:
     def self.new_instance
       @local_env = NewRelic::LocalEnvironment.new

test/new_relic/control_test.rb

@@ -1,11 +1,5 @@
 require File.expand_path(File.join(File.dirname(__FILE__),'/../test_helper'))
 
-module NewRelic
-  class Control
-    public :log_file_name
-  end
-end
-
 class NewRelic::ControlTest < Test::Unit::TestCase
 
   attr_reader :c