Update citext's documentation to match the recently-applied patch, per David Wheeler.
Update citext's documentation to match the recently-applied patch,
per David Wheeler.

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