Netjsonconfig

--------------------------

- Fixed modem-manager configuration for OpenWrt 21
- Fixed WiFi interface configuration for OpenWrt 21

--------------------------

Features
~~~~~~~~

- Added support for the new
`DSA bridge syntax to the OpenWrt backend
<http://netjsonconfig.openwisp.org/en/latest/backends/openwrt.html#openwrt-backend>`_
- Added support for
`Wireguard
<http://netjsonconfig.openwisp.org/en/latest/backends/wireguard.html>`_
and `Wireguard/VXLAN
<http://netjsonconfig.openwisp.org/en/latest/backends/vxlan_over_wireguard.html>`_
- Added support for
`Wireguard interfaces in OpenWrt backend <http://netjsonconfig.openwisp.org/en/latest/backends/openwrt.html#wireguard>`_
- Added support for
`VXLAN interfaces in OpenWrt backend <http://netjsonconfig.openwisp.org/en/latest/backends/openwrt.html#vxlan>`_
- Added ``auth_nocache`` proprety to the ``OpenVpn`` backend
- Added support for OpenVPN tls-auth option,
the OpenVPN backend will automatically create a file for the
key present in "tls_auth" field and update the value of the
"tls-auth" parameter
- Added ``proto`` to remote setting of the ``OpenVpn`` backend
- Added support for IEEE 802.11w configurations to the ``OpenWrt`` backend
- Added support for Wifi6 / IEEE 802.11ax to the ``OpenWrt`` backend
- Added support for basic IEEE 802.11r options to the ``OpenWrt`` backend
- Added support for WPA3 to the ``OpenWrt`` backend
- Added support for EAP-PEAP as ``auth`` method in WPA2 enterprise
wifi client configuration of ``OpenWrt`` backend
- Removed option of 2.4GHz radio for 802.11ac from the ``OpenWrt`` backend

Changes
~~~~~~~

Backward incompatible changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- By default, the ``OpenWrt`` backend now generates bridge syntax
in the new DSA compatible format, to override this, ``dsa=False``
must be passed during the initialization of the backend

Dependencies
^^^^^^^^^^^^

- Dropped support for Python 3.6
- Added support for Python 3.8 and 3.9
- Upgraded Jinja to 3.0
- Upgraded jsonschema to 3.2.x
- Upgraded to openwisp-utils 1.0.x and reformatted code
with latest version of the black formatter

Other changes
^^^^^^^^^^^^^

- Simplified bridging of wifi interfaces in the OpenWrt backend:
users can now simply add a wifi interface to a bridge and forget
about having to update also the attached networks of the
OpenWrt configuration

Bugfixes
~~~~~~~~

- Ensured values are always deep copied when using ``merge_config``,
without this change the different schemas remain interwined
and a dynamic change to one part which is reused by other
schemas will affect different backends inadvertently
- The file ``path`` is not allowed to be an empty string anymore
- Ignored duplicate list elements when merging templates:
detect identical elements present in both lists
to avoid adding the duplicate to the result;
this is needed because some templates may share
one or multiple common files and these do not
not have to be duplicated
- Fixed typo in EAP TTLS protocol ``enum_title``
of ``OpenWrt`` backend:
it was showing EAP-PEAP even though TTLS was set
- Fixed madwifi driver for legacy systems
- Fixed comp-lzo option for legacy OpenVPN in OpenWisp1 backend
- Fixed UCI format backward compatibility with OpenWISP 1
This fix is needed to allow workarounds in the code of
OpenWISP-Firmware to keep working also with OpenWISP 2

--------------------------

- [fix] Removed ``mtu_disc`` from ``auto_client`` method because it causes
issues on most OpenWRT systems
- [fix] Avoided maxLength on PIN property to allow configuration variables
- [change] Add missing TLS ciphers to OpenVPN

--------------------------

- [change] **Potentially backward incompatible**:
added support for dialup interfaces (ppp, pppoe, pppoa,
3g, qmi, ncm, wwan, pptp, 6in4, aiccu or l2tp) to openwrt backend.
This change is backward incompatible if the same type of configuration
was achieved using a workaround, in these cases the configuration
will have to be upgraded to use the new format.
- [feature] Added support for modem manager interfaces

--------------------------

- [fix] Fixed bug in OpenWRT backend validation for ip_rules/src

--------------------------

- Fixed bug that prevented overriding the contents of a file present
in a template and caused the file to be duplicated instead of overwritten
- Fixed bug affecting backward conversion of switch VLAN on OpenWRT