trac 17 update set_log_level api notice

http://libwebsockets.org/trac/ticket/17

Reported-by: dbrnz
Signed-off-by: Andy Green <andy.green@linaro.org>
diff --git a/lib/libwebsockets.c b/lib/libwebsockets.c
index 65adcf5..0291acb 100644
--- a/lib/libwebsockets.c
+++ b/lib/libwebsockets.c
@@ -2245,7 +2245,7 @@
  *			function to perform log string emission instead of
  *			the default stderr one.
  *
- *	log level defaults to "err" and "warn" contexts enabled only and
+ *	log level defaults to "err", "warn" and "notice" contexts enabled and
  *	emission on stderr.
  */