Ensure that the top level sysctl nodes (kern, vfs, net, ...) exist before
the sysctl link sets are processed, and remove redundancy.

Shaves >13kB off of an amd64 GENERIC, not to mention >1k duplicat

Ensure that the top level sysctl nodes (kern, vfs, net, ...) exist before
the sysctl link sets are processed, and remove redundancy.

Shaves >13kB off of an amd64 GENERIC, not to mention >1k duplicate
lines of code.

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add support for elantech (v2) touchpads that report input pressure

Replace pms_synaptics_send_command() and identical pms_elantech_send_command()
with pms_sliced_command(). Linux shows that this sequence can also be used by
"Logitech PS/2++" protocol as well.

Silence printf in common "device not found" error path.

Remove debug printfs

Add Elantech multi-touch driver.