adduser : {user : string, passwd : string option} -> string option,
passwd : {user : string, passwd : string} -> string option,
createdb : {user : string, dbname : string} -> string option,
- dropdb : {user : string, dbname : string} -> string option}
+ dropdb : {user : string, dbname : string} -> string option,
+ grant : {user : string, dbname : string} -> string option}
val dbmses : handler StringMap.map ref = ref StringMap.empty