Add mention of MySQL compatibility for LIMIT in HISTORY.
Add mention of MySQL compatibility for LIMIT in HISTORY.

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