[session] enforce coherency of login/passwd couple values when no anonymous user (closes: #1910849) None may be returned for both if anonymous connection is not allowed or if an empty login is used in configuration Raise ConfigurationError is anonymous login is non-ascii (convention)

usr/lib/python2.4/site-packages/cubicweb/
etc/init.d
etc/cubicweb.d
etc/bash_completion.d
usr/bin
usr/share/doc/cubicweb-ctl
var/log/cubicweb
var/lib/cubicweb/backup
var/lib/cubicweb/instances