DOC: update RFC references
A few doc and code comment updates bumping RFC references to the new
ones.
diff --git a/include/common/defaults.h b/include/common/defaults.h
index 1618ab4..81dc3b1 100644
--- a/include/common/defaults.h
+++ b/include/common/defaults.h
@@ -136,7 +136,7 @@
#endif
// cookie delimitor in "prefix" mode. This character is inserted between the
-// persistence cookie and the original value. The '~' is allowed by RFC2965,
+// persistence cookie and the original value. The '~' is allowed by RFC6265,
// and should not be too common in server names.
#ifndef COOKIE_DELIM
#define COOKIE_DELIM '~'