PATCH: docs for reject_non_fqdn_helo_hostname

[Noel Jones]

This attempts to clarify the description for
reject_non_fqdn_helo_hostname. There seems to be end-user confusion
about whether this feature should also reject address literals,
which of course it is not intended to.



*** proto/postconf.proto        Wed Jul 10 19:01:20 2013
--- /tmp/tmp/postconf.proto     Mon Aug  5 17:07:19 2013
***************
*** 5529,5535 ****
  <dt><b><a
name="reject_non_fqdn_helo_hostname">reject_non_fqdn_helo_hostname</a></b>
(with Postfix &lt; 2.3: reject_non_fqdn_hostname)</dt>

  <dd>Reject the request when the HELO or EHLO hostname is not in
! fully-qualified domain form, as required by the RFC. Note: specify
  "smtpd_helo_required = yes" to fully enforce this restriction
  (without "smtpd_helo_required = yes", a client can simply skip
  reject_non_fqdn_helo_hostname by not sending HELO or EHLO).  <br>
--- 5529,5535 ----
  <dt><b><a
name="reject_non_fqdn_helo_hostname">reject_non_fqdn_helo_hostname</a></b>
(with Postfix &lt; 2.3: reject_non_fqdn_hostname)</dt>

  <dd>Reject the request when the HELO or EHLO hostname is not in
! fully-qualified domain or address literal form, as required by the
RFC. Note: specify
  "smtpd_helo_required = yes" to fully enforce this restriction
  (without "smtpd_helo_required = yes", a client can simply skip
  reject_non_fqdn_helo_hostname by not sending HELO or EHLO).  <br>



  -- Noel Jones