acme: Include empty 'dns' config option by default

This should hopefully prevent issues with that option not showing up in the
GUI, like in #11095.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>

net/acme/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=acme
 PKG_VERSION:=2.8.3
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://codeload.github.com/Neilpang/acme.sh/tar.gz/$(PKG_VERSION)?

net/acme/files/acme.config

@@ -10,4 +10,5 @@ config cert 'example'
        option update_uhttpd 1
        option update_nginx 1
        option webroot ""
+       option dns ""
        list domains example.org