Make the found-a-buffer-when-we-were-expecting-to-extend-the-rel path actually work.  It had been throwing an Assert as of my recent changes to bufmgr.c, but was not really right even before that AFAICT.
Make the found-a-buffer-when-we-were-expecting-to-extend-the-rel path
actually work.  It had been throwing an Assert as of my recent changes
to bufmgr.c, but was not really right even before that AFAICT.

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