LDAP improvement

[JimmyJanisson]

Details

• add a property to members table to flag ldap members and prevent them to login if ldap has been disabled
• update login methode :
  • if ldap is enabled, try to find user in ldap, if not found try to found it in db
  • email and nickname are supported in ldap login
  • setting member nickname and email from a specified ldap property set in the config file
• add specific config to enable/disable reset password and register actions (no more link with ldap config)
• disable nickname input in profile form for ldap users
• show inputs on profile form as disabled instead of hiding them

I think that would be great to add web configuration access and a check to verify that the ldap user still exist in each request.
I'll try to do that when i'll get more time.