docs: improve documentation of beaker session configuration beaker.session.auto is dropped; it defaults to false and there is no reason to ever set it true for Kallithea. beaker.session.cookie_path and secure are dropped; like cookie_domain, they should automatically be set to the right value. * * * beaker.session.cookie_expires MUST have the default value of True to provide the default value of 'browser session lifetime' when not enabling 'remember' in the login box. The cookie life is hardcoded to 365 days when remember is selected.