Fix some bogosities in geometric-function documentation: add an entry for circle(polygon), which was missing; remove bogus entry for point(lseg, lseg), which does not exist, and the documentation seemed to describe lseg_interpt, which we already document as an operator not a function.  Also remove entry for box_intersect, which likewise is preferentially used via the operator #.
Fix some bogosities in geometric-function documentation: add an entry
for circle(polygon), which was missing; remove bogus entry for
point(lseg, lseg), which does not exist, and the documentation seemed to
describe lseg_interpt, which we already document as an operator not a
function.  Also remove entry for box_intersect, which likewise is
preferentially used via the operator #.

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