Introduction of http session in ordre to replace a lot of cookies, for better user interface and security.
  -new table session_table
  -new module SympaSession.pm
  -new features 
    - from admin page set log level for the current session
    - from admin page list active sessions
    - from admin page change user email identity
  -new task to purge old sessions from table (inactive delay to remove session is set by the sympa.conf parameter session_expiration_period (defaul 1 month)
  -session start at first hit usually with an anonymous user. The session continue when the user logging. 
  -cookie lang replaced by a session parameter
  -cookie sympa-user removed
 
TODO : introduce user pref based obn session for review page length and archive thread/chrono view . Need to introduce a structure data varchar column in user_table

 


git-svn-id: https://subversion.renater.fr/sympa/trunk@4550 05aa8bb8-cd2b-0410-b1d7-8918dfa770ce