Add "High Availability, Load Balancing, and Replication Feature Matrix" table to docs.
Add "High Availability, Load Balancing, and Replication Feature Matrix"
table to docs.

yazun/postgres-xl,xuegang/gpdb,cjcjameson/gpdb,cjcjameson/gpdb,ahachete/gpdb,CraigHarris/gpdb,lintzc/gpdb,techdragon/Postgres-XL,lintzc/gpdb,cjcjameson/gpdb,ashwinstar/gpdb,zaksoup/gpdb,0x0FFF/gpdb,50wu/gpdb,postmind-net/postgres-xl,yuanzhao/gpdb,xuegang/gpdb,Quikling/gpdb,tpostgres-projects/tPostgres,postmind-net/postgres-xl,0x0FFF/gpdb,lintzc/gpdb,ashwinstar/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,royc1/gpdb,pavanvd/postgres-xl,rvs/gpdb,kmjungersen/PostgresXL,snaga/postgres-xl,ahachete/gpdb,50wu/gpdb,zaksoup/gpdb,xinzweb/gpdb,Chibin/gpdb,yuanzhao/gpdb,Postgres-XL/Postgres-XL,zeroae/postgres-xl,arcivanov/postgres-xl,janebeckman/gpdb,rvs/gpdb,0x0FFF/gpdb,oberstet/postgres-xl,ahachete/gpdb,zeroae/postgres-xl,xuegang/gpdb,Postgres-XL/Postgres-XL,CraigHarris/gpdb,adam8157/gpdb,Quikling/gpdb,techdragon/Postgres-XL,kaknikhil/gpdb,pavanvd/postgres-xl,kaknikhil/gpdb,50wu/gpdb,lisakowen/gpdb,edespino/gpdb,arcivanov/postgres-xl,ahachete/gpdb,0x0FFF/gpdb,ovr/postgres-xl,Chibin/gpdb,lintzc/gpdb,lisakowen/gpdb,kaknikhil/gpdb,xuegang/gpdb,greenplum-db/gpdb,lisakowen/gpdb,chrishajas/gpdb,oberstet/postgres-xl,jmcatamney/gpdb,Quikling/gpdb,Chibin/gpdb,Postgres-XL/Postgres-XL,50wu/gpdb,janebeckman/gpdb,xuegang/gpdb,kaknikhil/gpdb,snaga/postgres-xl,Quikling/gpdb,edespino/gpdb,greenplum-db/gpdb,edespino/gpdb,zeroae/postgres-xl,zaksoup/gpdb,chrishajas/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,tpostgres-projects/tPostgres,0x0FFF/gpdb,rvs/gpdb,rvs/gpdb,chrishajas/gpdb,chrishajas/gpdb,lintzc/gpdb,edespino/gpdb,cjcjameson/gpdb,adam8157/gpdb,chrishajas/gpdb,jmcatamney/gpdb,Chibin/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,zaksoup/gpdb,lisakowen/gpdb,adam8157/gpdb,snaga/postgres-xl,CraigHarris/gpdb,xuegang/gpdb,ahachete/gpdb,Postgres-XL/Postgres-XL,techdragon/Postgres-XL,arcivanov/postgres-xl,edespino/gpdb,janebeckman/gpdb,Quikling/gpdb,tpostgres-projects/tPostgres,royc1/gpdb,jmcatamney/gpdb,kaknikhil/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,oberstet/postgres-xl,oberstet/postgres-xl,adam8157/gpdb,edespino/gpdb,chrishajas/gpdb,lisakowen/gpdb,adam8157/gpdb,pavanvd/postgres-xl,xinzweb/gpdb,Chibin/gpdb,adam8157/gpdb,janebeckman/gpdb,xuegang/gpdb,CraigHarris/gpdb,zaksoup/gpdb,yazun/postgres-xl,CraigHarris/gpdb,yazun/postgres-xl,janebeckman/gpdb,Quikling/gpdb,zeroae/postgres-xl,techdragon/Postgres-XL,0x0FFF/gpdb,0x0FFF/gpdb,edespino/gpdb,xinzweb/gpdb,ovr/postgres-xl,techdragon/Postgres-XL,greenplum-db/gpdb,rvs/gpdb,Quikling/gpdb,arcivanov/postgres-xl,pavanvd/postgres-xl,kmjungersen/PostgresXL,rvs/gpdb,kaknikhil/gpdb,xinzweb/gpdb,snaga/postgres-xl,postmind-net/postgres-xl,50wu/gpdb,kmjungersen/PostgresXL,lisakowen/gpdb,royc1/gpdb,lintzc/gpdb,adam8157/gpdb,janebeckman/gpdb,jmcatamney/gpdb,zaksoup/gpdb,zeroae/postgres-xl,chrishajas/gpdb,tpostgres-projects/tPostgres,ahachete/gpdb,ashwinstar/gpdb,adam8157/gpdb,lintzc/gpdb,kmjungersen/PostgresXL,CraigHarris/gpdb,yuanzhao/gpdb,rvs/gpdb,rvs/gpdb,janebeckman/gpdb,Chibin/gpdb,kmjungersen/PostgresXL,edespino/gpdb,yazun/postgres-xl,snaga/postgres-xl,kaknikhil/gpdb,edespino/gpdb,ahachete/gpdb,postmind-net/postgres-xl,xinzweb/gpdb,xuegang/gpdb,postmind-net/postgres-xl,lintzc/gpdb,CraigHarris/gpdb,royc1/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,janebeckman/gpdb,zaksoup/gpdb,ovr/postgres-xl,rvs/gpdb,Quikling/gpdb,50wu/gpdb,50wu/gpdb,CraigHarris/gpdb,lintzc/gpdb,cjcjameson/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,janebeckman/gpdb,Chibin/gpdb,jmcatamney/gpdb,xinzweb/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,rvs/gpdb,kaknikhil/gpdb,royc1/gpdb,Chibin/gpdb,ahachete/gpdb,lisakowen/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,royc1/gpdb,50wu/gpdb,ovr/postgres-xl,arcivanov/postgres-xl,cjcjameson/gpdb,ovr/postgres-xl,xinzweb/gpdb,lisakowen/gpdb,kaknikhil/gpdb,cjcjameson/gpdb,pavanvd/postgres-xl,Postgres-XL/Postgres-XL,edespino/gpdb,xuegang/gpdb,Chibin/gpdb,0x0FFF/gpdb,yuanzhao/gpdb,xinzweb/gpdb,royc1/gpdb,Quikling/gpdb,chrishajas/gpdb,yazun/postgres-xl,greenplum-db/gpdb,ashwinstar/gpdb,oberstet/postgres-xl,royc1/gpdb,Quikling/gpdb,Chibin/gpdb,arcivanov/postgres-xl,tpostgres-projects/tPostgres,zaksoup/gpdb,cjcjameson/gpdb,greenplum-db/gpdb,janebeckman/gpdb