module type Conf = sig .. end
What we need to manage sessions.
type
to identify a user in the handler functions
val failure_handler : string -> Toolhtml.doc
To return a document from an error message, when
a page handler raises the Failure exception.
val get_user_id : Ows.session_id -> Ows.hostname -> t option
to get a user id from the session id and the host name
val page_varname : string
the variable name to use for the page in urls,
with only the following characters: a-z A-Z 0-9 '-' '_'
val session_varname : string
the variable name to use for the session id in urls,
with only the following characters: a-z A-Z 0-9 '-' '_'