More man pages improvements;  also needed to test sgml build.
More man pages improvements;  also needed to test sgml build.

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