Fix error messages from recent pg_hba parsing patch to use errcontext() to indicate where the error occurred.
Fix error messages from recent pg_hba parsing patch to use errcontext()
to indicate where the error occurred.

greenplum-db/gpdb,edespino/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,zeroae/postgres-xl,arcivanov/postgres-xl,50wu/gpdb,greenplum-db/gpdb,edespino/gpdb,techdragon/Postgres-XL,lisakowen/gpdb,50wu/gpdb,oberstet/postgres-xl,postmind-net/postgres-xl,edespino/gpdb,lisakowen/gpdb,50wu/gpdb,greenplum-db/gpdb,pavanvd/postgres-xl,ashwinstar/gpdb,Postgres-XL/Postgres-XL,50wu/gpdb,ovr/postgres-xl,adam8157/gpdb,edespino/gpdb,yuanzhao/gpdb,arcivanov/postgres-xl,xinzweb/gpdb,xinzweb/gpdb,Chibin/gpdb,yazun/postgres-xl,pavanvd/postgres-xl,jmcatamney/gpdb,xinzweb/gpdb,lisakowen/gpdb,postmind-net/postgres-xl,ashwinstar/gpdb,greenplum-db/gpdb,Postgres-XL/Postgres-XL,edespino/gpdb,yazun/postgres-xl,arcivanov/postgres-xl,lisakowen/gpdb,50wu/gpdb,ashwinstar/gpdb,zeroae/postgres-xl,greenplum-db/gpdb,kmjungersen/PostgresXL,ovr/postgres-xl,Chibin/gpdb,arcivanov/postgres-xl,xinzweb/gpdb,ashwinstar/gpdb,lisakowen/gpdb,adam8157/gpdb,yuanzhao/gpdb,adam8157/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,yazun/postgres-xl,lisakowen/gpdb,techdragon/Postgres-XL,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,yuanzhao/gpdb,Chibin/gpdb,kmjungersen/PostgresXL,oberstet/postgres-xl,Chibin/gpdb,50wu/gpdb,pavanvd/postgres-xl,jmcatamney/gpdb,adam8157/gpdb,tpostgres-projects/tPostgres,yuanzhao/gpdb,ovr/postgres-xl,arcivanov/postgres-xl,lisakowen/gpdb,yuanzhao/gpdb,snaga/postgres-xl,adam8157/gpdb,greenplum-db/gpdb,tpostgres-projects/tPostgres,50wu/gpdb,yazun/postgres-xl,yuanzhao/gpdb,jmcatamney/gpdb,Chibin/gpdb,tpostgres-projects/tPostgres,pavanvd/postgres-xl,oberstet/postgres-xl,greenplum-db/gpdb,edespino/gpdb,snaga/postgres-xl,snaga/postgres-xl,50wu/gpdb,ovr/postgres-xl,yuanzhao/gpdb,Postgres-XL/Postgres-XL,greenplum-db/gpdb,yuanzhao/gpdb,zeroae/postgres-xl,ashwinstar/gpdb,techdragon/Postgres-XL,ashwinstar/gpdb,Chibin/gpdb,yazun/postgres-xl,zeroae/postgres-xl,adam8157/gpdb,xinzweb/gpdb,Chibin/gpdb,edespino/gpdb,oberstet/postgres-xl,snaga/postgres-xl,ashwinstar/gpdb,techdragon/Postgres-XL,pavanvd/postgres-xl,lisakowen/gpdb,xinzweb/gpdb,snaga/postgres-xl,edespino/gpdb,jmcatamney/gpdb,kmjungersen/PostgresXL,postmind-net/postgres-xl,adam8157/gpdb,xinzweb/gpdb,tpostgres-projects/tPostgres,Chibin/gpdb,Chibin/gpdb,postmind-net/postgres-xl,arcivanov/postgres-xl,edespino/gpdb,postmind-net/postgres-xl,oberstet/postgres-xl,edespino/gpdb,techdragon/Postgres-XL,kmjungersen/PostgresXL,kmjungersen/PostgresXL,xinzweb/gpdb,jmcatamney/gpdb,adam8157/gpdb,jmcatamney/gpdb,tpostgres-projects/tPostgres,zeroae/postgres-xl,ovr/postgres-xl,Chibin/gpdb