Log the date/time stamp of each query/response to the data/guru.log.

src/sbbs3/chat.cpp

@@ -8,7 +8,7 @@
  * @format.tab-size 4		(Plain Text/Source Code File Header)			*
  * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
  *																			*
- * Copyright 2013 Rob Swindell - http://www.synchro.net/copyright.html		*
+ * Copyright Rob Swindell - http://www.synchro.net/copyright.html			*
  *																			*
  * This program is free software; you can redistribute it and/or			*
  * modify it under the terms of the GNU General Public License				*
@@ -1792,6 +1792,9 @@ void sbbs_t::guruchat(char* line, char* gurubuf, int gurunum, char* last_answer)
 			if((file=nopen(str,O_WRONLY|O_CREAT|O_APPEND))==-1)
 				errormsg(WHERE,ERR_OPEN,str,O_WRONLY|O_CREAT|O_APPEND);
 			else {
+				xpDateTime_to_isoDateTimeStr(xpDateTime_now(), "-", " ", ":", 0, str, sizeof(str)-3);
+				strcat(str,"\r\n");
+				write(file,str,strlen(str));
 				if(action==NODE_MCHT) {
 					sprintf(str,"[Multi] ");
 					write(file,str,strlen(str));