docs: add release notes for Gluon v2016.2.4

docs/index.rst

@@ -64,6 +64,7 @@ Releases
 .. toctree::
    :maxdepth: 1
 
+   releases/v2016.2.4
    releases/v2016.2.3
    releases/v2016.2.2
    releases/v2016.2.1

docs/releases/v2016.2.4.rst

+Gluon 2016.2.4
+==============
+
+Bugfixes
+~~~~~~~~
+
+* Fix batman-adv (compat 15) not being able to transmit packages of specific sizes (`b7eeef9 <https://github.com/freifunk-gluon/gluon/commit/b7eeef9b04b44a70b2a953c4efe35a3fdceba2db>`_)
+
+  We suspect that this issue was also the reason for the autoupdater/wget hangs observed by many communities.
+  Non-Gluon-nodes like gateways should be updated to batman-adv 2017.0.1 to get the fix.
+
+* Fix build after ftp.all.kernel.org discontinuation (`#1059 <https://github.com/freifunk-gluon/gluon/issues/1059>`_)
+
+* Fix high load because of frequent calls of the respondd initscript (`9a0aeb9 <https://github.com/freifunk-gluon/gluon/commit/9a0aeb9b7482df4e4515e61356b9d393e3a7eacb>`_)
+
+  The respondd restart triggers added in v2016.2.3 ran a significant portion of the respondd initscript for each router advertisement
+  received. This was fixed by a backport of a netifd patch.
+
+* x86 sysupgrade fixes (`41fd50d <https://github.com/freifunk-gluon/gluon/commit/41fd50d20ba31d73c4796c5b2d4eb44ad2258b90>`_,
+  `ad37e2b <https://github.com/freifunk-gluon/gluon/commit/ad37e2b6b43b2c3389356d892b04f3873d8f6b93>`_)
+
+  This fixes sysupgrade on mmcblk and similar devices.
+
+Other changes
+~~~~~~~~~~~~~
+
+* The manifest generator has been extended to generate SHA256 checksums in addition to SHA512 ones
+  (`f9d59be <https://github.com/freifunk-gluon/gluon/commit/f9d59be731efd31a26c59e049ccbdc4b1762f6b1>`_)
+
+  We have recently switched the autoupdater to SHA256 in the Gluon master to avoid mixing two different
+  lengths of hashes for no good reason. This makes the manifests of Gluon v2016.2.x compatible with the
+  new autoupdater so it doesn't prevent backports or downgrades.
+
+  **Note:** Downgrades of major Gluon versions are generally unsupported and will often lead to
+  broken configurations.
+
+Known Issues
+~~~~~~~~~~~~
+
+* x86 sysupgrade (sometimes) loses config when kernel partition grows (`#1010 <https://github.com/freifunk-gluon/gluon/issues/1010>`_)
+
+  This issue affects upgrades from v2016.2.x and older to the Gluon master only, we hope to fix it before the next
+  major release.
+
+* 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.
+
+* 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 promicious mode is disallowed).
+
+* Inconsistent respondd API (`#522 <https://github.com/freifunk-gluon/gluon/issues/522>`_)
+
+  The current API is inconsistent and will be replaced eventually. The old API will still be supported for a while.