Fix documentation to specify the correct range of timezone offsets for type time with time zone, ie, +/- 13:59 not +/- 12:00.  Also some minor wording improvements.
Fix documentation to specify the correct range of timezone offsets for
type time with time zone, ie, +/- 13:59 not +/- 12:00.  Also some minor
wording improvements.

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