Further code review for genbki.pl.  Improve comments, fix some rather random code choices, don't slavishly duplicate the original pg_attribute.h's failure to put an OID into Schema_pg_index entries.
Further code review for genbki.pl.  Improve comments, fix some
rather random code choices, don't slavishly duplicate the original
pg_attribute.h's failure to put an OID into Schema_pg_index entries.

lisakowen/gpdb,greenplum-db/gpdb,ovr/postgres-xl,yazun/postgres-xl,lisakowen/gpdb,greenplum-db/gpdb,50wu/gpdb,pavanvd/postgres-xl,lisakowen/gpdb,adam8157/gpdb,arcivanov/postgres-xl,postmind-net/postgres-xl,zeroae/postgres-xl,adam8157/gpdb,tpostgres-projects/tPostgres,arcivanov/postgres-xl,yazun/postgres-xl,jmcatamney/gpdb,snaga/postgres-xl,kmjungersen/PostgresXL,jmcatamney/gpdb,greenplum-db/gpdb,50wu/gpdb,xinzweb/gpdb,zeroae/postgres-xl,lisakowen/gpdb,xinzweb/gpdb,lisakowen/gpdb,50wu/gpdb,greenplum-db/gpdb,arcivanov/postgres-xl,ashwinstar/gpdb,adam8157/gpdb,ashwinstar/gpdb,ashwinstar/gpdb,adam8157/gpdb,zeroae/postgres-xl,pavanvd/postgres-xl,pavanvd/postgres-xl,ashwinstar/gpdb,xinzweb/gpdb,tpostgres-projects/tPostgres,techdragon/Postgres-XL,50wu/gpdb,techdragon/Postgres-XL,ashwinstar/gpdb,50wu/gpdb,kmjungersen/PostgresXL,tpostgres-projects/tPostgres,lisakowen/gpdb,kmjungersen/PostgresXL,lisakowen/gpdb,ashwinstar/gpdb,oberstet/postgres-xl,snaga/postgres-xl,50wu/gpdb,Postgres-XL/Postgres-XL,techdragon/Postgres-XL,Postgres-XL/Postgres-XL,oberstet/postgres-xl,techdragon/Postgres-XL,postmind-net/postgres-xl,postmind-net/postgres-xl,kmjungersen/PostgresXL,tpostgres-projects/tPostgres,snaga/postgres-xl,xinzweb/gpdb,jmcatamney/gpdb,yazun/postgres-xl,Postgres-XL/Postgres-XL,xinzweb/gpdb,zeroae/postgres-xl,oberstet/postgres-xl,jmcatamney/gpdb,jmcatamney/gpdb,postmind-net/postgres-xl,tpostgres-projects/tPostgres,adam8157/gpdb,xinzweb/gpdb,Postgres-XL/Postgres-XL,ashwinstar/gpdb,greenplum-db/gpdb,oberstet/postgres-xl,arcivanov/postgres-xl,xinzweb/gpdb,adam8157/gpdb,jmcatamney/gpdb,oberstet/postgres-xl,greenplum-db/gpdb,ovr/postgres-xl,postmind-net/postgres-xl,snaga/postgres-xl,greenplum-db/gpdb,50wu/gpdb,adam8157/gpdb,adam8157/gpdb,greenplum-db/gpdb,lisakowen/gpdb,ovr/postgres-xl,kmjungersen/PostgresXL,pavanvd/postgres-xl,jmcatamney/gpdb,ashwinstar/gpdb,pavanvd/postgres-xl,xinzweb/gpdb,jmcatamney/gpdb,ovr/postgres-xl,ovr/postgres-xl,techdragon/Postgres-XL,yazun/postgres-xl,snaga/postgres-xl,yazun/postgres-xl,Postgres-XL/Postgres-XL,arcivanov/postgres-xl,zeroae/postgres-xl,arcivanov/postgres-xl,50wu/gpdb