Added missing quotation mark in search value.

Keeps overwriting custom path.

I'm running Ubuntu 16.04 and has changed 
x-httpd-suphp="php:/usr/bin/php-cgi"
To
x-httpd-suphp="php:/usr/bin/php-cgi5.6"
And when i update ispconfig it keeps adding this to the end of the file
x-httpd-suphp="php:/usr/bin/php-cgi"

See merge request !358

- disabled database logging of sql reconnect errors, fixed #3974

- remove certificate renew config on domain deleting

add translations to list-files



See merge request !357

First part of fix for issue #3896 - Unknown column 'default_mailserver' in 'field list' when saving client limits main template

Fix db stats - Please review

I think I found the fix... Please review if that's correct tough.
I just added  sys_group.groupid = web_database.sys_groupid AND

closes ispconfig/ispconfig3#3963
closes ispconfig/ispconfig3#3920

See merge request !355

fixed remove mail-backups (Bernd Kilmer)



See merge request !356

please review the change!