Currently, there is no configure switch for consistently disabling
alsa detection. This changeset introduces the possibility to do so
during the configure stage and adds ALSA as a non-default OPTION.
PR: 207892
Submitted by: tatsuki_makino@hotmail.com
Reported by: bar
Reviewed by: xxjack12xx@gmail.com, riggs
Approved by: xxjack12xx@gmail.com (maintainer)
