More release-notes copy editing, from Neil Conway.
More release-notes copy editing, from Neil Conway.

rvs/gpdb,rubikloud/gpdb,snaga/postgres-xl,ahachete/gpdb,lintzc/gpdb,adam8157/gpdb,arcivanov/postgres-xl,tangp3/gpdb,adam8157/gpdb,xuegang/gpdb,greenplum-db/gpdb,kmjungersen/PostgresXL,royc1/gpdb,0x0FFF/gpdb,rubikloud/gpdb,foyzur/gpdb,atris/gpdb,Quikling/gpdb,arcivanov/postgres-xl,adam8157/gpdb,lintzc/gpdb,xinzweb/gpdb,xinzweb/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,50wu/gpdb,zeroae/postgres-xl,edespino/gpdb,postmind-net/postgres-xl,ahachete/gpdb,adam8157/gpdb,Quikling/gpdb,tpostgres-projects/tPostgres,xinzweb/gpdb,yazun/postgres-xl,CraigHarris/gpdb,royc1/gpdb,lintzc/gpdb,0x0FFF/gpdb,jmcatamney/gpdb,0x0FFF/gpdb,chrishajas/gpdb,CraigHarris/gpdb,Quikling/gpdb,lisakowen/gpdb,xinzweb/gpdb,CraigHarris/gpdb,chrishajas/gpdb,lintzc/gpdb,Quikling/gpdb,foyzur/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,rvs/gpdb,Quikling/gpdb,Quikling/gpdb,Chibin/gpdb,kaknikhil/gpdb,ahachete/gpdb,rvs/gpdb,snaga/postgres-xl,jmcatamney/gpdb,xinzweb/gpdb,rvs/gpdb,tangp3/gpdb,adam8157/gpdb,ashwinstar/gpdb,foyzur/gpdb,Postgres-XL/Postgres-XL,edespino/gpdb,xuegang/gpdb,xinzweb/gpdb,50wu/gpdb,postmind-net/postgres-xl,tangp3/gpdb,xuegang/gpdb,50wu/gpdb,cjcjameson/gpdb,chrishajas/gpdb,0x0FFF/gpdb,lpetrov-pivotal/gpdb,50wu/gpdb,zaksoup/gpdb,lpetrov-pivotal/gpdb,yuanzhao/gpdb,foyzur/gpdb,Quikling/gpdb,ovr/postgres-xl,xuegang/gpdb,CraigHarris/gpdb,randomtask1155/gpdb,yazun/postgres-xl,Chibin/gpdb,royc1/gpdb,edespino/gpdb,ashwinstar/gpdb,ahachete/gpdb,yuanzhao/gpdb,rvs/gpdb,xinzweb/gpdb,yazun/postgres-xl,CraigHarris/gpdb,0x0FFF/gpdb,janebeckman/gpdb,arcivanov/postgres-xl,kaknikhil/gpdb,cjcjameson/gpdb,0x0FFF/gpdb,zaksoup/gpdb,oberstet/postgres-xl,0x0FFF/gpdb,pavanvd/postgres-xl,lisakowen/gpdb,adam8157/gpdb,Postgres-XL/Postgres-XL,yuanzhao/gpdb,rvs/gpdb,janebeckman/gpdb,lintzc/gpdb,Chibin/gpdb,zeroae/postgres-xl,lintzc/gpdb,atris/gpdb,kaknikhil/gpdb,randomtask1155/gpdb,xuegang/gpdb,tpostgres-projects/tPostgres,zaksoup/gpdb,0x0FFF/gpdb,lpetrov-pivotal/gpdb,ahachete/gpdb,Quikling/gpdb,rubikloud/gpdb,xuegang/gpdb,yazun/postgres-xl,janebeckman/gpdb,kaknikhil/gpdb,kaknikhil/gpdb,zaksoup/gpdb,lisakowen/gpdb,kaknikhil/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,edespino/gpdb,janebeckman/gpdb,arcivanov/postgres-xl,techdragon/Postgres-XL,atris/gpdb,cjcjameson/gpdb,xuegang/gpdb,CraigHarris/gpdb,chrishajas/gpdb,lintzc/gpdb,tangp3/gpdb,adam8157/gpdb,Quikling/gpdb,lpetrov-pivotal/gpdb,Chibin/gpdb,edespino/gpdb,Chibin/gpdb,rvs/gpdb,atris/gpdb,ahachete/gpdb,Postgres-XL/Postgres-XL,yazun/postgres-xl,lpetrov-pivotal/gpdb,pavanvd/postgres-xl,chrishajas/gpdb,CraigHarris/gpdb,janebeckman/gpdb,cjcjameson/gpdb,techdragon/Postgres-XL,oberstet/postgres-xl,atris/gpdb,royc1/gpdb,janebeckman/gpdb,ahachete/gpdb,yuanzhao/gpdb,edespino/gpdb,pavanvd/postgres-xl,kmjungersen/PostgresXL,lisakowen/gpdb,yuanzhao/gpdb,janebeckman/gpdb,rvs/gpdb,cjcjameson/gpdb,cjcjameson/gpdb,kaknikhil/gpdb,greenplum-db/gpdb,kmjungersen/PostgresXL,cjcjameson/gpdb,lisakowen/gpdb,atris/gpdb,arcivanov/postgres-xl,snaga/postgres-xl,zaksoup/gpdb,kaknikhil/gpdb,randomtask1155/gpdb,adam8157/gpdb,janebeckman/gpdb,rvs/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,zeroae/postgres-xl,lintzc/gpdb,rubikloud/gpdb,tangp3/gpdb,lintzc/gpdb,lpetrov-pivotal/gpdb,zaksoup/gpdb,janebeckman/gpdb,yuanzhao/gpdb,xinzweb/gpdb,foyzur/gpdb,50wu/gpdb,snaga/postgres-xl,jmcatamney/gpdb,Chibin/gpdb,lpetrov-pivotal/gpdb,greenplum-db/gpdb,oberstet/postgres-xl,chrishajas/gpdb,edespino/gpdb,kaknikhil/gpdb,rvs/gpdb,postmind-net/postgres-xl,foyzur/gpdb,atris/gpdb,randomtask1155/gpdb,ovr/postgres-xl,randomtask1155/gpdb,chrishajas/gpdb,Chibin/gpdb,Chibin/gpdb,rubikloud/gpdb,ovr/postgres-xl,tangp3/gpdb,rubikloud/gpdb,pavanvd/postgres-xl,ahachete/gpdb,tpostgres-projects/tPostgres,zeroae/postgres-xl,ashwinstar/gpdb,ovr/postgres-xl,kmjungersen/PostgresXL,Postgres-XL/Postgres-XL,50wu/gpdb,Chibin/gpdb,jmcatamney/gpdb,zeroae/postgres-xl,randomtask1155/gpdb,foyzur/gpdb,tangp3/gpdb,ovr/postgres-xl,greenplum-db/gpdb,yuanzhao/gpdb,chrishajas/gpdb,lisakowen/gpdb,atris/gpdb,cjcjameson/gpdb,snaga/postgres-xl,kaknikhil/gpdb,lisakowen/gpdb,jmcatamney/gpdb,royc1/gpdb,greenplum-db/gpdb,postmind-net/postgres-xl,Chibin/gpdb,yuanzhao/gpdb,oberstet/postgres-xl,tpostgres-projects/tPostgres,50wu/gpdb,rubikloud/gpdb,jmcatamney/gpdb,kmjungersen/PostgresXL,arcivanov/postgres-xl,pavanvd/postgres-xl,tangp3/gpdb,CraigHarris/gpdb,50wu/gpdb,postmind-net/postgres-xl,edespino/gpdb,foyzur/gpdb,randomtask1155/gpdb,xuegang/gpdb,royc1/gpdb,rubikloud/gpdb,cjcjameson/gpdb,ashwinstar/gpdb,royc1/gpdb,zaksoup/gpdb,greenplum-db/gpdb,Quikling/gpdb,xuegang/gpdb,randomtask1155/gpdb,Postgres-XL/Postgres-XL,techdragon/Postgres-XL,edespino/gpdb,oberstet/postgres-xl,CraigHarris/gpdb,royc1/gpdb,techdragon/Postgres-XL,zaksoup/gpdb,lpetrov-pivotal/gpdb,tpostgres-projects/tPostgres,janebeckman/gpdb,edespino/gpdb,techdragon/Postgres-XL,lisakowen/gpdb,greenplum-db/gpdb