Add file to explain SGML linking options, for use by SGML document writers.
Add file to explain SGML linking options, for use by SGML document
writers.

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