ENH: adjust sendmail-whois 'active' example to have also sendername in it

config/jail.conf

@@ -65,9 +65,7 @@ usedns = warn
 enabled  = false
 filter   = sshd
 action   = iptables[name=SSH, port=ssh, protocol=tcp]
-           sendmail-whois[name=SSH, dest=you@example.com, sender=fail2ban@example.com]
+           sendmail-whois[name=SSH, dest=you@example.com, sender=fail2ban@example.com, sendername="Fail2Ban"]
-# Alternative example:
-#          sendmail-whois[name=SSH, sendername="Fail2Ban - example.com"]
 logpath  = /var/log/sshd.log
 maxretry = 5