New organization of users pictures. Picturees are stores in a directory named "pictures" which is a
sub directory of 'static_contennt_path' . static_contennt_path is a parameter that can be specified
in robot.conf or sympa.conf. pictures must be served by apache under static_content_url.

Pictures can be enabled with pictures_feature parameter in robot.conf (or sympa.conf) AND list config.


git-svn-id: https://subversion.renater.fr/sympa/trunk@3764 05aa8bb8-cd2b-0410-b1d7-8918dfa770ce