Cause tab completion to do something moderately reasonable with mixed-case identifiers --- it will now complete these correctly with double quoting. Fix a few other issues in passing.
Cause tab completion to do something moderately reasonable with mixed-case
identifiers --- it will now complete these correctly with double quoting.
Fix a few other issues in passing.

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