Allow overriding HSTYLE and PSTYLE from environment
Allow overriding HSTYLE and PSTYLE from environment

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