hwdb: map zoomin/out keys to up/down

Some keyboards come with a zoom see-saw or rocker which until now got
mapped to the Linux "zoomin/out" keys in hwdb. However, these keycodes
are not recognized by any major desktop. They now produce Up/Down key
events so that they can be used for scrolling.

The internet is full of instructions how to "unbreak" these keys, e. g.

  https://askubuntu.com/questions/471802/make-the-zoom-slider-of-microsoft-natural-ergonomic-keyboard-4000-and-7000-scrol
  https://unix.stackexchange.com/questions/322075/how-to-get-ms-natural-ergonomic-4000-slider-work-on-linux-mint

So let's make it official. But keep their physical meaning in comments
in case desktops start to do something useful with them at some point.

Thanks to Finn Christiansen for the original patch!

Replaces #6953

diff --git a/NEWS b/NEWS
index 95126d661bc6658f14eb62d7973083741adfa621..3fc947f98838829bb345ac639b8fef5d84346faa 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,14 @@
 systemd System and Service Manager
 
+CHANGES WITH 237 in spe:
+
+        * Some keyboards come with a zoom see-saw or rocker which until now got
+          mapped to the Linux "zoomin/out" keys in hwdb. However, these
+          keycodes are not recognized by any major desktop. They now produce
+          Up/Down key events so that they can be used for scrolling.
+
+        — Berlin, 2018-XX-XX
+
 CHANGES WITH 236:
 
         * The modprobe.d/ drop-in for the bonding.ko kernel module introduced