Resolve "update the system plugin"

See merge request fusiondirectory/fd-plugins!746

array_push expects at least 2 arguments before PHP 7.3 so we can’t use
 it with expand operator when we are not sure the array is not empty.

issue #6039

Resolve "update the system plugin"

See merge request fusiondirectory/fd-plugins!745

issue #6039

Resolve "update the system plugin"

See merge request fusiondirectory/fd-plugins!705

issue #6039

issue #6039

When data comes from edition instead of LDAP it was showing the boolean
 as ""/1 instead of FALSE/TRUE, leading to inconsistencies.

issue #6039

issue #6039

issue #6039

issue #6039

issue #6039

issue #6039

Also adds support for IPv6

issue #6039

issue #6039

issue #6039

issue #6039

issue #6039

This allow adding and saving interfaces to a template, but it will not
 work when applying the template.
Also there are PHP errors when using systems template because of
 template class expecting tabs to be simplePlugin instances.

issue #6039

issue #6039

issue #6039

issue #6039

Modify interfaces management system so that changes are saved after the
 system itself is saved, instead of saving each interface upon saving
 it.
This avoids problems when saving the system trigger errors.
This also allows to create interfaces at system creation.

issue #6039

This currently breaks:
* System creation for system types with mandatory IP
* System templates
* System import (OPSI import at least)
* Webservice access (not tested)
* Unicity checks on IPs and Macs (Pop-up shows but the interface object
already changed)

Also saving an interface modification and then canceling the system
 edition will leave the LDAP data with inconsitent data, so we need to
 somehow trigger system save upon interface save.

issue #6039

issue #6039

issue #6039

issue #6039

Resolve "make an ipam plugin"

See merge request fusiondirectory/fd-plugins!742

issue #6040

Resolve "remove the freeradius schema from our sources"

Closes #6060

See merge request fusiondirectory/fd-plugins!741

Resolve "Add a basic kerberos plugin"

See merge request fusiondirectory/fd-plugins!740

Signed-off-by: Benoit Mortier <benoit.mortier@fusiondirectory.org>

This hides krbPrincipalKey and adds support for showing
 content of KrbExtraDataAttribute correctly.

issue #6055

Resolve "make an ipam plugin"

See merge request fusiondirectory/fd-plugins!739

issue #6040

issue #6040

Resolve "make an ipam plugin"

See merge request fusiondirectory/fd-plugins!738

issue #6040

Also removed useless or wrong attribute parameters

issue #6040

issue #6039