Fix pgbench to handle empty lines in script files as documented. patches contributed by Itagaki Takahiro.
Fix pgbench to handle empty lines in script files as documented.
patches contributed by Itagaki Takahiro.

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