docs: add Gluon 2022.1.2 release notes

(cherry picked from commit f000a605cd)

docs/releases/index.rst

@@ -5,6 +5,7 @@ Release Notes
   :caption: Gluon 2022.1
   :maxdepth: 2
 
+  v2022.1.2
   v2022.1.1
   v2022.1
 

docs/releases/v2022.1.2.rst

@@ -0,0 +1,37 @@
+Gluon 2022.1.2
+==============
+
+Bugfixes
+--------
+
+ * Various build-errors which sporadically occur when building with a large thread-count have been fixed
+ 
+ * Android devices do not lose their IPv6 connectivity after extended idle-time
+ 
+ * The 802.11s mesh network is now using 802.11ax HE-modes when supported by hardware
+
+
+Known issues
+------------
+
+* Upgrading EdgeRouter-X from versions before v2020.1.x may lead to a soft-bricked state due to bad blocks on the NAND flash which the NAND driver before this release does not handle well.
+  (`#1937 <https://github.com/freifunk-gluon/gluon/issues/1937>`_)
+
+* The integration of the BATMAN_V routing algorithm is incomplete.
+
+  - Mesh neighbors don't appear on the status page. (`#1726 <https://github.com/freifunk-gluon/gluon/issues/1726>`_)
+    Many tools have the BATMAN_IV metric hardcoded, these need to be updated to account for the new throughput
+    metric.
+  - Throughput values are not correctly acquired for different interface types.
+    (`#1728 <https://github.com/freifunk-gluon/gluon/issues/1728>`_)
+    This affects virtual interface types like bridges and VXLAN.
+
+* Default TX power on many Ubiquiti devices is too high, correct offsets are unknown
+  (`#94 <https://github.com/freifunk-gluon/gluon/issues/94>`_)
+
+  Reducing the TX power in the Advanced Settings is recommended.
+
+* In configurations without VXLAN, the MAC address of the WAN interface is modified even when Mesh-on-WAN is disabled
+  (`#496 <https://github.com/freifunk-gluon/gluon/issues/496>`_)
+
+  This may lead to issues in environments where a fixed MAC address is expected (like VMware when promiscuous mode is disallowed).