Adapt to new modular config mode, add new reboot-ffhh package

this makes the old ffhh specific config mode obsolte, as only
a package (reboot-ffhh) is need to add the necessary information
to the reboot page

gluon-config-mode-reboot-ffhh/Makefile

@@ -0,0 +1,36 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=gluon-config-mode-reboot-ffhh
+PKG_VERSION:=2
+
+PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
+
+include $(GLUONDIR)/include/package.mk
+
+define Package/gluon-config-mode-reboot-ffhh
+  SECTION:=gluon
+  CATEGORY:=Gluon
+  TITLE:=Show text on reboot page if mesh vpn is disabled
+  DEPENDS:=+gluon-config-mode-core
+endef
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+endef
+
+define Build/Configure
+endef
+
+define Build/Compile
+endef
+
+define Package/gluon-config-mode-reboot-ffhh/install
+	$(CP) ./files/* $(1)/
+endef
+
+define Package/gluon-config-mode-reboot-ffhh/postinst
+#!/bin/sh
+$(call GluonCheckSite,check_site.lua)
+endef
+
+$(eval $(call BuildPackage,gluon-config-mode-reboot-ffhh))

gluon-config-mode-reboot-ffhh/check_site.lua

@@ -0,0 +1 @@
+need_string 'config_mode.msg_nopubkey'

gluon-config-mode-reboot-ffhh/files/lib/gluon/config-mode/reboot/0101-nopubkey.lua

@@ -0,0 +1,22 @@
+local msg = [[<p>
+               <%= luci.template.render_string(site.config_mode.msg_nopubkey) %>
+             </p>]]
+
+local uci = luci.model.uci.cursor()
+local meshvpn_enabled = uci:get("fastd", "mesh_vpn", "enabled", "0")
+
+if meshvpn_enabled == "1" then
+  return nil
+else
+  local site = require 'gluon.site_config'
+  local sysconfig = require 'gluon.sysconfig'
+
+  local hostname = uci:get_first("system", "system", "hostname")
+
+  return function ()
+           luci.template.render_string(msg, { hostname=hostname
+                                            , site=site
+                                            , sysconfig=sysconfig
+                                            })
+         end
+end