various improvements

- use dig for resolving host names
- ascon.c: fix terminator parsing
- property callback: change property before callback
- logger.c:default for logger period must be the old value instead of 1
- add frappy type history writing
- increase max. logreader line length
- HIPNONE returns "null" with json protocol
- encode strings properly in formatNameValue
- fix memory leak in json2tcl
- scriptcontext: do not show debug messages when script starts with underscore or when the "send" property is empty
- scriptcontext: remove args for action timestamp
- scriptcontext: "que" function will replace an already queued action, e.g. for 'halt
- introduced updatestatus script

scriptcontext.h

@@ -14,10 +14,11 @@ typedef struct SctController SctController;
  * \param node the node
  * \param prio the priority
  * \param action the initial state
+ * \param replace 0 queue does not replace, 1: entries with the same node and action are replaced
  * \param con an optional connection to be used by the action scripts
  */
 void SctQueueNode(SctController * controller, Hdb * node,
-                  DevPrio prio, char *action, SConnection * con);
+                  DevPrio prio, char *action, int replace, SConnection * con);
 
 /** \brief call a script and configure the sct command to be used
  * in connection with the given node and controller