within Rs/Re reference blocks, use %U instead of %O (or any other

variants) for URLs, allowing mandoc -Thtml to properly generate links;
(sendmail.8 changes are simply using Lk, which i somehow missed in previous)
ingo reminded me to verify that gnu groff recognises %U: 1.20.1 does not,
but 1.21 does;

src/lib/libc/hash/mdX.3

@@ -6,9 +6,9 @@
 .\" this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
 .\" ----------------------------------------------------------------------------
 .\"
-.\" 	$OpenBSD: mdX.3,v 1.11 2010/07/13 22:34:45 tedu Exp $
+.\" 	$OpenBSD: mdX.3,v 1.12 2012/08/18 08:44:25 jmc Exp $
 .\"
-.Dd $Mdocdate: July 13 2010 $
+.Dd $Mdocdate: August 18 2012 $
 .Dt MDX 3
 .Os
 .Sh NAME
@@ -169,7 +169,7 @@ characters of buffer space.
 .Rs
 .%A RSA Laboratories
 .%T Frequently Asked Questions About today's Cryptography
-.%O \&<http://www.rsa.com/rsalabs/faq/>
+.%U http://www.rsa.com/rsalabs/faq/
 .Re
 .Rs
 .%A H. Dobbertin