Beef up the HP-UX README with some more information.

svn path=/trunk/; revision=1372

README.hpux

@@ -20,3 +20,41 @@ If you want to use Ethereal to capture packets, you will have to install
 "libpcap"; the INSTALL file for "libpcap" has several comments about
 HP-UX, which you should read if you're going to install and use
 "libpcap" on HP-UX.
+
+Another note, from a mail message to the "ethereal-users" list:
+
+Date: Wed, 22 Dec 1999 09:05:47 -0600 (EST)
+From: Gerald Combs <gerald@zing.org>
+To: Lothar Seitter <lothar.seitter@arcormail.de>
+cc: ethereal-users@zing.org
+Subject: Re: [ethereal-users] permission problem with capturing
+
+On Wed, 22 Dec 1999, Lothar Seitter wrote:
+
+> running 'ethereal' under HP-UX 11 with root permission and
+> /dev/lan0 set to 777, I always get the message:
+> "There are no network interfaces that can be opened.
+> Please to make sure you have sufficient permission to 
+> capture packets."
+> 
+> I start ethereal with 'etheral -i lan0' and lan0 is definitely
+> the lan interface.
+> 
+> What am I missing???
+
+You may need to reference the card's DLPI device directly.  We were having
+trouble getting Ethereal to capture on an HP-UX 10.20 machine here.  I
+found an article on Deja News that says:
+
+"To access a particular interface, you would say "tcpdump -i /dev/dlpiN"
+where N is the PPA of the interface you wish to use. You get the PPA by
+looking at the output of lanscan. On 10.20, it is the same value as the
+NMID. On 11.X, it is the Card Instance number."
+
+This didn't help in our case, but it might in yours.  The full article is
+at http://x34.deja.com/[ST_rn=ps]/getdoc.xp?AN=549366486 .
+
+Another article by the same author mentions that experimental versions of
+libpcap and tcpdump are available at
+ftp://ftp.cup.hp.com/dist/networking/tools/ .  The article itself is at
+http://x34.deja.com/[ST_rn=ps]/getdoc.xp?AN=558665378 .