Describe new command to create alternate database locations.
Describe new command to create alternate database locations.

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