Right now, the winamp2 plugin only displays the first
field of a given name, and the "Separate tag values
with" box in the config screen is broken and ignored.
This fixes both these problems. The separation string
is correctly stored, and when a file has more than one
comment with a given fieldname, they are concatenated
together with the separation string in between, in the
order they are found in the vorbis_comment block.