Clean up md5.c to make it clearer that it is a frontend-and-backend module.  Don't rely on backend palloc semantics; in fact, best to not use palloc at all, rather than #define'ing it to malloc, because that just encourages errors of omission.  Bug spotted by Volkan YAZICI, but I went further than he did to fix it.
Clean up md5.c to make it clearer that it is a frontend-and-backend
module.  Don't rely on backend palloc semantics; in fact, best to not
use palloc at all, rather than #define'ing it to malloc, because that
just encourages errors of omission.  Bug spotted by Volkan YAZICI,
but I went further than he did to fix it.

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