Add note about pg_stats to pg_statistic entry; add sections for pg_largeobject, pg_listener, pg_rewrite, pg_trigger; miscellaneous small improvements.
Add note about pg_stats to pg_statistic entry; add sections for
pg_largeobject, pg_listener, pg_rewrite, pg_trigger; miscellaneous
small improvements.

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