webif: mark as deprecated

It's long dead upstream and hasn't seen any updates since it got added
back in 2008.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/webif/Config.in

@@ -1,6 +1,7 @@
 config BR2_PACKAGE_WEBIF
 	bool "webif - Status Console"
 	depends on BR2_PACKAGE_BUSYBOX # httpd
+	depends on BR2_DEPRECATED
 	select BR2_PACKAGE_HASERL
 	help
 	  A web interface for showing different network status. This package