Changed ca_errmsg callback to a more generic variant

Includes all error, log and debug messages
See [Customized NETCONF error message](https://github.com/clicon/clixon/issues/454)

lib/src/clixon_event.c

@@ -50,6 +50,7 @@
 #include <string.h>
 #include <signal.h>
 #include <syslog.h>
+#include <sys/param.h>
 #include <sys/types.h>
 #include <sys/time.h>
 
@@ -58,6 +59,8 @@
 #include "clixon_queue.h"
 #include "clixon_hash.h"
 #include "clixon_handle.h"
+#include "clixon_yang.h"
+#include "clixon_xml.h"
 #include "clixon_log.h"
 #include "clixon_debug.h"
 #include "clixon_err.h"