Modify rc script to allow M-Audio devices to be set up as the default
sound device upon detection.
PR: ports/164605
Submitted by: Aragon Gouveia <aragon@phat.za.net> (maintainer)
In the rc.d scripts, change assignments to rcvar to use the
literal name_enable wherever possible, and ${name}_enable
when it's not, to prepare for the demise of set_rcvar().
In cases where I had to hand-edit unusual instances also
modify formatting slightly to be more uniform (and in
some cases, correct). This includes adding some $FreeBSD$
tags, and most importantly moving rcvar= to right after
name= so it's clear that one is derived from the other.