Present a login link, regardless of the state of login
Syntax: %LOGINURL%
Expand to: /cgi-bin/twiki/bin/login/TWiki/VarLOGINURL?origurl=/cgi-bin/twiki/bin/view/TWiki/VarLOGINURL%3fcover%3dprint%253Bcover%253Dprint%25253brev%25253d1%253Brev%253D1%26rev%3d1