show customer name and loginname in ticket-archive if customer-exists

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
allow custom sendmail_path value in php.ini when using php-fpm, fixes #1323

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
fixed translation of 'traffic' for german

Signed-off-by: Roman Schmerold (BNoiZe) <bnoize@froxlor.org>
fix sql-query (thx to anonymous report) in admin-customers; fix german language-string (thx to dnano91)

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
Merge remote-tracking branch 'origin/0.9.31'