Fix error messages for the lack of multi-byte support. Since --with-mb has been removed from configure, previous messages were not appropriate.
Fix error messages for the lack of multi-byte support.
Since --with-mb has been removed from configure, previous
messages were not appropriate.

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