Update ChangeLog and jail.conf example

ChangeLog

@@ -35,6 +35,9 @@ ver. 0.8.11 (2013/XX/XXX) - wanna-be-released
    * fail2ban-client -- log to standard error. Closes gh-264
    * Fail to configure if not a single log file was found for an
      enabled jail. Closes gh-63
+  Alexander Dietrich
+   * action.d/sendmail-common.conf -- added common sendmail settings file
+     and made the sender display name configurable
 
 ver. 0.8.10 (2013/06/12) - wanna-be-secure
 -----------

config/jail.conf

@@ -66,6 +66,8 @@ enabled  = false
 filter   = sshd
 action   = iptables[name=SSH, port=ssh, protocol=tcp]
            sendmail-whois[name=SSH, dest=you@example.com, sender=fail2ban@example.com]
+# Alternative example:
+#          sendmail-whois[name=SSH, sendername="Fail2Ban - example.com"]
 logpath  = /var/log/sshd.log
 maxretry = 5