doc: add a small page about contributing to libinput

To be expanded at some future time...

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

doc/Makefile.am

@@ -10,6 +10,7 @@ header_files = \
 	$(srcdir)/absolute-coordinate-ranges.dox \
 	$(srcdir)/building.dox \
 	$(srcdir)/clickpad-softbuttons.dox \
+	$(srcdir)/contributing.dox \
 	$(srcdir)/device-configuration-via-udev.dox \
 	$(srcdir)/faqs.dox \
 	$(srcdir)/gestures.dox \

doc/contributing.dox

@@ -0,0 +1,18 @@
+/**
+
+@page contributing Contributing to libinput
+
+Contributions to libinput are always welcome. Any patches should be sent to
+the
+[wayland-devel](https://lists.freedesktop.org/mailman/listinfo/wayland-devel)
+email list with a subject prefix of ````[PATCH libinput]````. The easiest
+way to achieve that is to run the following command in the libinput
+repository:
+
+	git config --add format.subjectprefix "PATCH libinput"
+
+Likewise, any new features should also be discussed publicly on the
+wayland-devel list.
+
+*/
+

doc/page-hierarchy.dox

@@ -36,6 +36,10 @@
 
 @page developers Developers
 
+Contributions to libinput are always welcome. See the links below for
+specific documentation.
+
+- @subpage contributing
 - @subpage building_libinput
 - @subpage test-suite
 - @subpage tools