Add comment about portability function name inconsistency.
Add comment about portability function name inconsistency.

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