- Add Sympa::DataSource::is_external().
  - use Sympa::List::get_exclusion(). As a side work
    Sympa::List::is_member_excluded() was deprecated.

Fix: Persistency (automatic reconnect) feature of Sympa::Database should be disabled during transaction.

Add create_list.closed scenario.

delete_list_member() failed removing subscribers' pictures

See discussion: #1186

Fix noise in HTTP server error log (#1185)

 Hide archive download link from users without proper permissions #1176

Obsolete escape_chars() / unescape_chars()

Bulk.pl didn't deliver mails if failed to personalize (#1174)

Error emails to listmaster from repeated set_netidtoemail_db calls (#1163)

Use web URL in instruction if web interface is available

Newlines in header fields added by ARC feature should be normalized (#1168)
Fix suggested by @dpc22.