Mark procs as deprecated, which were previously just documented as
deprecated and document recommended versions via @see. These procs
should be moved to *deprecated*.tcl after a while to give people
a chance to react (maybe in 5.11 or 5.12).
site_node::conn_url -> ad_conn
site_nodes_sync -> site_node::init_cache
site_node_id -> site_node::get_node_id -url
site_map_unmount_application -> site_node::unmount
site_node_delete_package_instance -> site_node::delete