Add pgpid_t for use with pids.
Add pgpid_t for use with pids.

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