Present a login link, regardless of the state of login
Syntax: %LOGINURL%
Expand to: /twiki/bin/login/TWiki/VarLOGINURL?origurl=/twiki/bin/view/TWiki/VarLOGINURL%3fcover%3dprint%253Bcover%253Dprint%25253bcover%25253dprint%2525253bcover%2525253dprint%252525253braw%252525253don