- added cron for letsencrypt renewal

fixed error in mail_backup -> all mail-backups would have been deleted with old code because of * in filename

Conflicts:
	interface/lib/classes/remoting.inc.php
	interface/web/mail/templates/mail_user_backup_list.htm
	interface/web/sites/lib/lang/en_web_backup_list.lng
	interface/web/sites/lib/lang/es_web_backup_list.lng
	interface/web/sites/lib/lang/tr_web_backup_list.lng
	server/plugins-available/backup_plugin.inc.php

Replace fastcgi_pass unix:/var/run/php5-fpm.sock; with fastcgi_pass unix:{fpm_socket}; in phpmyadmin and squirrelmail blocks, as they are considered apps and should use the same (apps.sock) listener.

Fix by dirkd: Since file() doesn't remove "\n" from the lines read the condition $lines[$l] == '' never evaluated to true. So $mailHeaders would always contain every line from the template while $mailBody contained none of them.

Together with the bugfix of PHP#68776 [1] disallowing multiple "\n"'s & preceding "\n" in mail()'s $additionalHeaders arg this caused mails not being sent because $mailHeaders would include at least one "\n\n" which was meant to separate the mail headers from the body.

[1] https://bugs.php.net/bug.php?id=68776

Since file() doesn't remove "\n" from the lines read the condition
`$lines[$l] == ''` never evaluated to true.
So $mailHeaders would always contain every line from the template while
$mailBody contained none of them.

Together with the bugfix of PHP#68776 [1] disallowing multiple "\n"'s &
preceding "\n" in mail()'s $additionalHeaders arg this caused mails not
being sent because $mailHeaders would include at least one "\n\n" which
was meant to separate the mail headers from the body.

[1] https://bugs.php.net/bug.php?id=68776

https://ssltools.websecurity.symantec.com/checker/views/csrCheck.jsp
You have 1 error
Your CSR contains a challenge phrase.
Adding a challenge phrase to a CSR is not a secure practice. Please generate a new CSR that does not contain a challenge phrase.

The problem occure while buying a cert from https://www.ssls.com/
The support reply with:
"Please regenerate it without the passphrase and try to activate the certificate once again."

    - make sure umlautdomains can be found in lists.
    - sorting by database name did not work in database quota list.
    - IDN: use standard from 2008 (which also works with "ß").

FS#3830 - Password is not updated in `mysql`.`user` table when read-only database user's password is changed