Removed redundant template modform.tt2.

Candidate fix for #305, #308: PostgreSQL: Issues related to utf8 flag

Family updates don't propagate owners/editors changes in the database #309

Merge branch 'jengels/remind_tasks' of https://github.com/jengels/sympa into jengels/jengels/remind_tasks

[-bug] Even if it is obsoleted, parameters with occurrence '1' or '1-n' in config file log warnings.

Sympa::List::restore_users() for owner/editor replaces users on database with content of dump file, instead of simply adding content of dump file.

Remove unused icons from repository

[-feature] "owner" and "editor" in list profile (create list template) are written in dump files when a family list is updated.

"Momderators" instead of "Moderators". I don't want my mom involved in moderation... ;-)

PostgreSQL: Strings got from database can have utf8 flag, and cause mojibake (breakage of texts) or crash by double-decoding.
Past fix on r12821 was insufficient because it dealt with input strings only.
Known bug: Past fix may crash with DBD::Pg 3.6.x or later.