Fix various bogosities in usage message.
Fix various bogosities in usage message.

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