Fix for Issue #4363 - dns_templatezone_add not working

This fixes Issue #4363.

'xfer' column can not be NULL in dns_soa table. Same solution is used in interface/web/dns/dns_wizard.php file.

It also returns created dns soa id - without return value SOAPpy would fail with "SAXParseException: <unknown>:1:0: no element found". All other functions I checked do return a value.

See merge request !564

added -l to umount commands

the log folder is not deleted, because the **umount** command needs to be lazy, that's why we added the **-l** argument.

```
Tue Mar 21 23:59:01 UTC 2017 umount: /home/0/57/log: target is busy
Tue Mar 21 23:59:01 UTC 2017 (In some cases useful info about processes that
Tue Mar 21 23:59:01 UTC 2017 use the device is found by lsof(8) or fuser(1).)
Tue Mar 21 23:59:01 UTC 2017 rm: cannot remove '/home/0/57/log': Device or resource busy
```

See merge request !561

Debian stretch



See merge request !563

Added possibility to set new aps to disabled by default 2

Update for ispconfig/ispconfig3!552

See merge request !558

context corrected



See merge request !560

fixes dontlog vulnerability

this fixes #4585

See merge request !559

This reverts commit dbec32fa

Update apache_ispconfig.vhost.master

error corrected

See merge request !539

webdav improved

a) Removes any handler inside webdav directory.

b) Removes any index, such as index.html, index.php, so that the AutoIndexes are shown properly.

c) Removes the dependency for apache module auth_compat if Apache version is greater than 2.2

See merge request !555

Add Devuan basic support

This merge request adds a basic support for Devuan (www.devuan.org)

See merge request !553

Certbot dir

this allows **certbot** to clean **.well-known/** and stops serving **emtpy.dir** file in all vhosts

See merge request !546

2007-2017 in LICENSE file



See merge request !550

unused index.htm with security vulnerability

the file **interface/index.htm** is unused, and in case someone is using ```interface/``` as **DocumentRoot**, then that someone would expose ```interface/ssl/ssl/ispserver.key```

See merge request !549

improved ftp regex for shorter directory

for example: **/www/0/1** this directory throws **directory_error_regex**, that's why **7**

See merge request !545