This reverts commit bdb77826d98544ab37741f740dd3516023924b27.
Jack1 is not obsolete and neither jack1 nor jack2 is called 'jackaudio'.
Q: What's the difference between Jack1 and Jack2?
A: http://trac.jackaudio.org/wiki/Q_differenc_jack1_jack2
Currently, we have a 'jack' package with attrname 'jack1d' and a
'jackdbus' package with attrname 'jackaudio'. Make it consistent 'jack1'
and 'jack2' in both package name and attrname.
This aligns the naming with what can be found on the JACK homepage.
Q: what's the difference between jack1 and jack2?
A: http://trac.jackaudio.org/wiki/Q_differenc_jack1_jack2
