Fix RFC URL.

scheme/lib/rfc822.scm

@@ -7,8 +7,7 @@
 ;;; -- the document that essentially tells how the fields in email headers
 ;;; (e.g., the Subject: and To: fields) are formatted. This code is for 
 ;;; parsing these headers. Here are two pointers to the document:
-;;; 	Emacs/ange	/ftp@ftp.internic.net:/rfc/rfc822.txt
-;;;	URL 		ftp://ftp.internic.net/rfc/rfc822.txt
+;;;	URL 		http://www.ietf.org/rfc/rfc0822.txt
 ;;; RFC 822 parsing is useful in other contexts as well -- the HTTP protocol
 ;;; uses it, and it tends to pop up here and there.
 ;;;