Checksetup function changes

[Max Kanat-Alexander]

	Hey. I've just checked-in bug 277617. It moves all of the GetFieldDef
functions and stuff like that from checksetup.pl into Bugzilla::DB.

	Unfortunately, this probably means that if you have a patch that
touched checksetup, it's been bit-rotted.

	It's very easy to fix, though. If you had a GetFieldDef, it's just
$dbh->bz_get_field_def now. Same for the other functions like
TableExists and so forth.

	See https://bugzilla.mozilla.org/show_bug.cgi?id=277617 for details.

	-Max
-- 
Max Kanat-Alexander
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