Always use php 7.0 (Backport from !624)

See merge request ispconfig/ispconfig3!1158

Use port variables instead of hardcoded port (Backport of !580)

See merge request ispconfig/ispconfig3!1155

DNS tabs

Closes #3727

See merge request ispconfig/ispconfig3!1154

Update copyright note

See merge request ispconfig/ispconfig3!1153

Remove unused file (Backport from !549)

See merge request ispconfig/ispconfig3!1152

Put IfModule in tmpl_if

See merge request ispconfig/ispconfig3!1151

Remove unused string

See merge request ispconfig/ispconfig3!1150

Fix typo (Ported from !449)

See merge request ispconfig/ispconfig3!1149

Fix typo in installer

See merge request ispconfig/ispconfig3!1148

Fix bold labels

See merge request ispconfig/ispconfig3!1146

Update installer_base.lib.php to fix the missed svr_ip

See merge request ispconfig/ispconfig3!1147

Add move to system.inc.php

See merge request ispconfig/ispconfig3!1142

- revert CAA checks from !1128 until we have a solid method for getting the correct CAA domain from a host name

Update installer_base.lib.php to fix the missed svr_ip that should have been modified to include both ipv4 and ipv6 in the previous quick fix before 911 ispconfig/ispconfig3!911 proposal was merged.

This caused failure to create LE SSL certs as reported in issue 5731 ispconfig/ispconfig3#5731.

This commit is aimed to fixed the said issue.

Add a new line at the end of the die in cron_debug.php

See merge request ispconfig/ispconfig3!1145

Remove LE from installer questions (#5729)

Closes #5729

See merge request ispconfig/ispconfig3!1144

stable-3.1 -> develop

See merge request ispconfig/ispconfig3!1080

Change date format (Ported from !621)

See merge request ispconfig/ispconfig3!1140