#114 Disabling of DID3 data in local discdb files

[Vladimir Petrov]

DGENRE: This field contains the exact genre of the disc
in a textual form
(i.e. write the genre here and do not use e.g. simply
the MP3 ID3V1
genre code). Please note that this genre is not
limited to the
11 CDDB-genres. The Genre in this field should be
capitalized, e.g.
"New Age" instead of "newage" or "new age".

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This patch synchronizes a local discdb entryes produced
by Grip to the quoted above part of cddb proto level 6
DBFORMAT.
DID3 is now unnecessary because DGENRE contains all
it's data.
One strcmp() is replaced by strcasecmp() to allow
parsing of a wrong uncapitalized DGENRE data.
Reading of DID3 is kept for compatibility to older
versions of Grip.

[Vladimir Petrov]

Disabling of DID3 data in local discdb files: patch file