Mute PC Speaker by default

alsa-project/alsa-utils issue #172 was opened from lnussel:

SUSE has a [preset](https://build.opensuse.org/package/view_file/openSUSE:Factory/alsa-utils/01b...) to mute the PC speaker by default as it can be quite annoying (https://bugzilla.suse.com/show_bug.cgi?id=767270). Would it make sense to include that upstream?

Issue URL : https://github.com/alsa-project/alsa-utils/issues/172 Repository URL: https://github.com/alsa-project/alsa-utils