Further enhancements to the new logging system

I removed traceCommand because I needed a more fine grained control of what goes into
the log.

logv2.h

@@ -57,6 +57,13 @@ typedef void (*LogCallback)(unsigned int severity, const char *timeStamp,
 void RegisterLogCallback(LogCallback func, void *userData);
 void RemoveLogCallback(LogCallback func);
 
+/* test if this log entry is filtered. Made a part of the API in support of 
+ * log listeners
+ * \param severity the severity of the message
+ * \param subsystem the subsystem of the message
+ * \return 1 when filtered, 0 else
+ */
+unsigned int logFilter(unsigned int severity, const char *subsystem);
 /*
  *Disable logging in support of the nolog option in SICSmain.c
  */
@@ -66,4 +73,13 @@ void DisableLog(void);
  */
 void LogClose(void *data);
 
+/*
+ * internal use in other logging functions
+ * \param severity The severity to encode
+ * \param buffer The buffer to write the severity as text too
+ * \param bufferLengh The length of buffer in order to prevent buffer overwrites
+ */
+void formatSeverity(unsigned int severity, 
+		    char *buffer, unsigned int bufferLength);
+
 #endif