only available from >= 1.0.15
Comments are useful. Apparently this config parameter was committed when
openwrt used an older version of lldpd which did not yet support it.
Signed-off-by: Paul Donald <newtwen+github@gmail.com>
(cherry picked from commit b476917502)
Link: https://github.com/openwrt/openwrt/pull/15299
Signed-off-by: Robert Marko <robimarko@gmail.com>