nutdrv_qx: add Voltronic-QS subdriver (nutdrv_qx protocol=voltronic-qs)

A subdriver using a protocol, specific to UPSes manufactured by Voltronic Power, based on the 'mustek' one (i.e. 'QS').
nutdrv_qx: update manuals for new 'voltronic-qs' subdriver
nutdrv_qx: fix nutdrv_qx_blazer-common.{c,h} header comments
HCL: add Atlantis Land/Voltronic Power units supported by nutdrv_qx
Merge branch 'zykh/nutdrv_qx_voltronic-qs'

New Voltronic-QS subdriver for nutdrv_qx.
blazer: fix man page references