Remove a couple of obsolete statements about how many buffers you can fit into a 512K shared memory segment.
Remove a couple of obsolete statements about how many buffers you can
fit into a 512K shared memory segment.

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