more doc cleanups
more doc cleanups

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