SYMBOL_CACHE_SIZE was removed in newer doxygen releases. We use the
default value, so simply drop it.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Doxygen is bad for man pages, but having an online API documentation
is better and easier to maintain.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>