Small pg_config.c cleanup.
Small pg_config.c cleanup.

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