<% Membership.unsubscribelink %>
macro renders a link to unsubscribe-action

Sourcecode in Membership/macros.js:
1:   function unsubscribelink_macro(param) {
2:      if (this.level == SUBSCRIBER)
3:         Html.link({href: this.site.href("unsubscribe")},
4:                   param.text ? param.text : getMessage("Membership.unsubscribe"));
5:      return;
6:   }