Merge commit '9835bc0' into dtls

* commit '9835bc0':
  Fix racy test.
  Fix stupid error in previous commit
  Don't check errors on ssl_close_notify()
  Fix char signedness issue
  Fix issue with non-blocking I/O & record splitting
  Fix warning

Conflicts:
	programs/ssl/ssl_client2.c
	programs/ssl/ssl_server2.c

programs/ssl/ssl_server2.c

@@ -2070,7 +2070,7 @@ data_exchange:
 
     buf[written] = '\0';
     printf( " %d bytes written in %d fragments\n\n%s\n", written, frags, (char *) buf );
-
+    ret = 0;
 
     /*
      * 7b. Continue doing data exchanges?