Update docs to explain that 7.1 locks down LC_COLLATE and LC_CTYPE at initdb time.  A few copy-editing cleanups, too.
Update docs to explain that 7.1 locks down LC_COLLATE and LC_CTYPE at
initdb time.  A few copy-editing cleanups, too.

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