WebUI/CP hardening, hide server version, close https://github.com/opnsense/core/issues/2618

src/etc/inc/plugins.inc.d/webgui.inc

@@ -238,7 +238,7 @@ server.max-keep-alive-idle = 30
 ## a static document-root, for virtual-hosting take look at the
 ## server.virtual-* options
 server.document-root        = "/usr/local/www/"
-
+server.tag = "OPNsense"
 
 {$http_rewrite_rules}
 

src/opnsense/service/templates/OPNsense/Captiveportal/lighttpd-zone.conf

@@ -131,6 +131,7 @@ server.tag               = "lighttpd"
 
 #### static document-root
 server.document-root     = "/htdocs/"
+server.tag = "OPNsense"
 
 #### chroot() to captive portal zone directory
 server.chroot            = "/var/captiveportal/zone{{cp_zone_item.zoneid}}"