Fix COPY documentation to not imply that HEADER can be used outside CSV mode. Per gripe from Bill Thoen.
Fix COPY documentation to not imply that HEADER can be used outside CSV mode.
Per gripe from Bill Thoen.

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