Additional modification to PR#141 by l4uc3 (issue #122) by l4uc3 & Ikedas

  - Use Fundation Grid instead of table.
  - Remove action buttons by each row: Only View button to open modal is left.

Create css_path during installation #148 by ikedas

Issue #78 quickfix by ikedas

Characters in pages are garbled (get "mojibake") with Perl 5.22.0 or later by ikedas

Cosmetic issue in error message with ldap driver #132 by ikedas

Feature: optionally restrict list ownership to specific domains (owner_domain) by mpkut

Users in non-Latin-1 languages (language other than "en", "de", "fr", ...) will notice this bug.

Background: Starting with Perl 5.22.0, POSIX::strftime() returns Unicode (utf8 flag set) string under UTF-8 locale.
- https://metacpan.org/pod/release/SHAY/perl-5.26.1/pod/perl5220delta.pod#Better-heuristics-on-older-platforms-for-determining-locale-UTF-8ness
- https://perl5.git.perl.org/perl.git/commit/9717af6d049902fc887c412facb2d15e785ef1a4

Sympa::Language::gettext_strftime() uses it to format localized date/time, and utf8-flagged texts were mixed in the output.

Fixed by dropping utf8 flag from the result of POSIX::strftime().

Remove outdated ca-bundle.crt and use system default #116 by ikedas

Before rebuilding admin_table, won't clear it #71 by ikedas

Remove "html" reception mode #125 by ikedas

Now system default will be used instead.

Cleanup on code.

[bug] If "cafile" and/or "capath" configuration parameters were not set, undef were passed to IO::Socket::SSL, and therefore system defaults were disabled.
Fixed by not passing undef when these parameters are not set so that system defaults will be used.