sync code with last improvements from OpenBSD

driver/xf86-input-synaptics/conf/70-synaptics.conf

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+# Example xorg.conf.d snippet that assigns the touchpad driver
+# to all touchpads. See xorg.conf.d(5) for more information on
+# InputClass.
+# DO NOT EDIT THIS FILE, your distribution will likely overwrite
+# it when updating. Copy (and rename) this file into
+# /etc/X11/xorg.conf.d first.
+# Additional options may be added in the form of
+#   Option "OptionName" "value"
+#
+#Section "InputClass"
+#        Identifier "touchpad catchall"
+#        Driver "synaptics"
+#        MatchIsTouchpad "on"
+## This option is recommend on all Linux systems using evdev, but cannot be
+## enabled by default. See the following link for details:
+## http://who-t.blogspot.com/2010/11/how-to-ignore-configuration-errors.html
+##       MatchDevicePath "/dev/input/event*"
+#EndSection
+
+Section "InputClass"
+        Identifier "touchpad ignore duplicates"
+        MatchIsTouchpad "on"
+        MatchOS "Linux"
+        MatchDevicePath "/dev/input/mouse*"
+        Option "Ignore" "on"
+EndSection
+
+# This option enables the bottom right corner to be a right button on clickpads
+# and the right and middle top areas to be right / middle buttons on clickpads
+# with a top button area.
+# This option is only interpreted by clickpads.
+Section "InputClass"
+        Identifier "Default clickpad buttons"
+        MatchDriver "synaptics"
+        Option "SoftButtonAreas" "50% 0 82% 0 0 0 0 0"
+        Option "SecondarySoftButtonAreas" "58% 0 0 15% 42% 58% 0 15%"
+EndSection
+
+# This option disables software buttons on Apple touchpads.
+# This option is only interpreted by clickpads.
+Section "InputClass"
+        Identifier "Disable clickpad buttons on Apple touchpads"
+        MatchProduct "Apple|bcm5974"
+        MatchDriver "synaptics"
+        Option "SoftButtonAreas" "0 0 0 0 0 0 0 0"
+EndSection