Fix a couple of missed None -> DestNone in comments.
Fix a couple of missed None -> DestNone in comments.

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