Make documentation more direct about the handling of COPY files based on the client encoding.
Make documentation more direct about the handling of COPY files based on
the client encoding.

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