adding include for explicit strlen

examples/server.c

@@ -6,7 +6,8 @@
 #include <signal.h>
 #include <errno.h> // errno, EINTR
 #include <stdio.h>
-#include <stdlib.h> 
+#include <stdlib.h>
+#include <string.h>
 #define __USE_XOPEN2K
 #ifdef UA_MULTITHREADING
 # include <pthread.h>

examples/server_simple.c

@@ -7,6 +7,7 @@
 #include <stdlib.h> 
 #include <signal.h>
 #include <errno.h> // errno, EINTR
+#include <string.h>
 
 #ifdef NOT_AMALGATED
     #include "ua_types.h"