The webservice provided by audio/libmusicbrainz3 will cease operation
on 2018-08-01. This patch made from several commits from KDE git ports the
track lookup functionality to audio/libmusicbrainz5 and audio/libdiscid.
I figured a monolithic patch would be a little cleaner since we're probably
not going to see many more KDE4 releases, but if there is a new release of kscd,
one patch file to delete would a little simpler. But, I can split the patch if
it really bugs somebody.
Should probably be MFH'd as well.