Use the new RFC macros wherever RFCs are referenced by number.  No other
changes.
diff --git a/Doc/libhtmllib.tex b/Doc/libhtmllib.tex
index 8405ad1..5fbb34d 100644
--- a/Doc/libhtmllib.tex
+++ b/Doc/libhtmllib.tex
@@ -1,6 +1,7 @@
 \section{Standard Module \sectcode{htmllib}}
 \label{module-htmllib}
 \stmodindex{htmllib}
+\rfcindex{1866}
 \index{HTML}
 \index{hypertext}
 
@@ -63,7 +64,7 @@
 
 \begin{funcdesc}{HTMLParser}{formatter}
 This is the basic HTML parser class.  It supports all entity names
-required by the HTML 2.0 specification (RFC 1866).  It also defines
+required by the HTML 2.0 specification (\rfc{1866}).  It also defines
 handlers for all HTML 2.0 and many HTML 3.0 and 3.2 elements.
 \end{funcdesc}