[www] mail.html - adding few links

Index: mail.html
===================================================================
RCS file: /cvs/www/mail.html,v
retrieving revision 1.165
diff -u -p -r1.165 mail.html
--- mail.html 1 Jun 2019 23:12:48 -0000 1.165
+++ mail.html 31 Jul 2019 20:05:16 -0000
@@ -240,7 +240,7 @@ These private addresses are for reportin

<p>
These lists are focused on user issues and development on individual
-platforms.
+<a href=plat.html>platforms</a>.

<dl>
<dt><b>alpha@openbsd.org</b>
@@ -294,14 +294,15 @@ comments.

<dl>
<dt><b>source-changes@openbsd.org</b>
-<dd>Automated mail of CVS source tree changes in the src, xenocara and www
-repositories.
+<dd>Automated mail of CVS source tree changes in the <code>src</code>,
+<code>xenocara</code> and <code>www</code> repositories.
<br>
(<a href="https://marc.info/?l=openbsd-cvs">Archive</a>)
<p>

<dt><b>ports-changes@openbsd.org</b>
-<dd>Automated mail of CVS source tree changes in the ports repository.
+<dd>Automated mail of CVS source tree changes in the <code>ports</code>
+repository.
<br>
(<a href="https://marc.info/?l=openbsd-ports-cvs">Archive</a>)

@@ -409,7 +410,7 @@ This is handy for those who don't like t
<p>
The insomniac at <a href="https://www.benzedrine.ch/mailinglist.html">
benzedrine.ch</a> maintains the <b>pf</b> list for people using the
-OpenBSD packet filter.
+<a href=faq/pf/index.html>OpenBSD packet filter</a>.
To subscribe, send an email with the message body of "subscribe" to
<a href="mailto:pf-request@benzedrine.ch">pf-request@benzedrine.ch</a>.

Hi,

here is a small cosmetics update for the mail.html.

Cheers,
Alex