plpgsql EXIT construct forgot to downcase or quote-strip its identifier argument, leading to label matching failures at run-time.  Per report from Patrick Fiche.  Also, fix it so that an unrecognized label argument draws a more useful error message than 'syntax error'.
plpgsql EXIT construct forgot to downcase or quote-strip its identifier
argument, leading to label matching failures at run-time.  Per report from
Patrick Fiche.  Also, fix it so that an unrecognized label argument draws
a more useful error message than 'syntax error'.

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