New script misc/dump-events.bro, along with core support, that dumps events Bro is raising

in an easily readable form.

This is for debugging purposes, obviously.

Example, including only SMTP events:

    > bro -r smtp.trace misc/dump-events.bro DumpEvents::include=/smtp/

    [...]
    1254722768.219663 smtp_reply
                  [0] c: connection   = [id=[orig_h=10.10.1.4, orig_p=1470/tcp, resp_h=74.53.140.153, [...]
                  [1] is_orig: bool   = F
                  [2] code: count     = 220
                  [3] cmd: string     = >
                  [4] msg: string     = xc90.websitewelcome.com ESMTP Exim 4.69 #1 Mon, 05 Oct 2009 01:05:54 -0500
                  [5] cont_resp: bool = T

    1254722768.219663 smtp_reply
                  [0] c: connection   = [id=[orig_h=10.10.1.4, orig_p=1470/tcp, resp_h=74.53.140.153, [...]
                  [1] is_orig: bool   = F
                  [2] code: count     = 220
                  [3] cmd: string     = >
                  [4] msg: string     = We do not authorize the use of this system to transport unsolicited,
                  [5] cont_resp: bool = T
    [...]

src/EventHandler.h

@@ -49,6 +49,8 @@ public:
 	static EventHandler* Unserialize(UnserialInfo* info);
 
 private:
+	void NewEvent(val_list* vl);	// Raise new_event() meta event.
+
 	const char* name;
 	Func* local;
 	FuncType* type;