Fix authentication so that it doesn't record an extra 'Password authentication failed' and a 'send() failed: Broken pipe' message on every connection from psql in password auth mode.  Problem is that psql doesn't ask user for a password until it sees a password challenge failure, and libpq just closes the connection unceremoniously if it's challenged for a password when it hasn't got one to send. Accordingly, EOF from the client after asking for a password is normal behavior and should not result in postmaster log entries.
Fix authentication so that it doesn't record an extra 'Password
authentication failed' and a 'send() failed: Broken pipe' message
on every connection from psql in password auth mode.  Problem is
that psql doesn't ask user for a password until it sees a password
challenge failure, and libpq just closes the connection unceremoniously
if it's challenged for a password when it hasn't got one to send.
Accordingly, EOF from the client after asking for a password is
normal behavior and should not result in postmaster log entries.

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