Support full POSIX-style time zone: EST+3, PST-3, etc. We probably support a superset of the spec, but I don't have the spec  to confirm this. Update regression tests to include tests for this format. Fix single-space typo in printed message in regress.sh.
Support full POSIX-style time zone: EST+3, PST-3, etc.
We probably support a superset of the spec, but I don't have the spec
 to confirm this.
Update regression tests to include tests for this format.
Fix single-space typo in printed message in regress.sh.

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