Add comments and remove CVS tag from md5.c so they remain identical.
Add comments and remove CVS tag from md5.c so they remain identical.

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