LOGINURL -- present a login link

• Present a login link, regardless of the state of login
• Syntax: %LOGINURL%
• Expand to: /do/login/TWiki/VarLOGINURL?origurl=/do/view/TWiki/VarLOGINURL%3fcover%3dprint%2525QUERYPARAMSTRING%2525
• Category: LinkingAndNavigationVariables, UsersAndAuthenticationVariables
• Related: TWikiUserAuthentication, LOGIN, LOGOUT, LOGOUTURL, SESSIONID, SESSIONVAR, SESSION_VARIABLE