have a primary key. Some of users want to use not-null unique keys rather than
primary keys because postgres doesn't support REINDEX PRIMARY KEY CONCURRENTLY.
- Support 9.1dev.
- Improve Makefile to use PGXS automatically.
pg_reorg broke catalog definition if the target table had any dropped columns.
Now pg_reorg removes dropped columns and renumbers valid columns.
You can use pg_reorg to shrink column definitions if you have many dropped
columns. (without pg_reorg, dropped columns are filled with zero forever)
