uhttpd: fix appending https ports to cmdline

Otherwise it is started only on non-secure ports.

Signed-off-by: Wojciech Dubowik <Wojciech.Dubowik@neratec.com>

SVN-Revision: 38171

package/network/services/uhttpd/files/uhttpd.init

@@ -112,7 +112,7 @@ start_instance()
 			append_arg "$cfg" key  "-K"
 
 			for listen in $https; do
-				append UHTTPD_ARGS "-s $listen"
+				procd_append_param command -s "$listen"
 			done
 		}
 	}