Improve descriptions of postmaster switches.
Improve descriptions of postmaster switches.

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