Update 'Mathematical Functions' table to reflect 7.3 addition of float8 forms of ceil(), floor(), sign().  Back-patch this and other recent doc fixes in this file to the 7.3 branch.
Update 'Mathematical Functions' table to reflect 7.3 addition of float8
forms of ceil(), floor(), sign().  Back-patch this and other recent
doc fixes in this file to the 7.3 branch.

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