library: Allow overriding global id3v23 option in write()
library: Allow overriding global id3v23 option in write()

sampsyo/beets,jackwilsdon/beets,jackwilsdon/beets,SusannaMaria/beets,beetbox/beets,beetbox/beets,beetbox/beets,sampsyo/beets,ibmibmibm/beets,SusannaMaria/beets,ibmibmibm/beets,shamangeorge/beets,ibmibmibm/beets,shamangeorge/beets,ibmibmibm/beets,SusannaMaria/beets,shamangeorge/beets,beetbox/beets,sampsyo/beets,sampsyo/beets,jackwilsdon/beets,shamangeorge/beets,jackwilsdon/beets,SusannaMaria/beets