No redefine warnings during reload
Remove exports from Bugzilla::Search
bzdbcopy.pl code style
get bzdbcopy.pl options from commandline
Check innodb in SHOW ENGINES (fix for MariaDB 10)
SQLite support, including EXPLAIN and FTS4 fulltext search
Make contrib/bzdbcopy.pl actually work with anything other than Pg.

Never use Bugzilla->dbh in Bugzilla::DB::Schema, store and use $self->{dbh} instead.