proxy, add extended file logging option for https://github.com/opnsense/core/issues/1507

(cherry picked from commit abad6f99)

src/opnsense/mvc/app/models/OPNsense/Proxy/Proxy.xml

@@ -35,6 +35,7 @@
                     <Required>N</Required>
                     <BlankDesc>File</BlankDesc>
                     <OptionValues>
+                        <file_extendend>File (Extended)</file_extendend>
                         <syslog>Syslog</syslog>
                     </OptionValues>
                 </target>

src/opnsense/service/templates/OPNsense/Proxy/squid.conf

@@ -331,6 +331,9 @@ acl accesslog_ignore src {{ OPNsense.proxy.general.logging.ignoreLogACL.replace(
 {%          endif %}
 {%          if OPNsense.proxy.general.logging.target|default('') == 'syslog' %}
 access_log syslog:local4.info {% if OPNsense.proxy.general.logging.ignoreLogACL|default('') %}!accesslog_ignore {% endif %}
+{%          elif OPNsense.proxy.general.logging.target|default('') == 'file_extendend' %}
+logformat opnsense      %>a %[ui %>eui %[un [%tl] "%rm %ru HTTP/%rv" %>Hs %<st "%{Referer}>h" "%{User-Agent}>h" %Ss:%Sh
+access_log /var/log/squid/access.log opnsense {% if OPNsense.proxy.general.logging.ignoreLogACL|default('') %}!accesslog_ignore {% endif %}
 {%          else %}
 access_log /var/log/squid/access.log squid {% if OPNsense.proxy.general.logging.ignoreLogACL|default('') %}!accesslog_ignore {% endif %}
 {%          endif %}