Fix example archive_command for standalone backups so it doesn't return spurious non-zero.
Fix example archive_command for standalone backups so it doesn't return spurious non-zero.

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