anchor.diff:  (define-command bgrewriteaof "Rewrite the append only file in the background when it gets too big.")
   
   ;; Remote server control commands
  +;; TODO: new config, debug, eval, evalsha, new info, migrate, monitor, object, script, slowlog
   
   (define-command info "Provide information and statistics about the server")
   (define-command slaveof (host :string) (port :integer) "Change the replication settings.")
   (define-command config "Configure a redis server at runtime.")
  -
  -;; Undocumented in command reference
  -
  +(define-command echo (message :string) "Echo the given string.")
   (define-command ping "Ping the redis server.")
  +(define-command time "Return the current server time.")
  
positive.code: (define-command renamenx :boolean (oldname :key) (newname :key) "Rename the old key to the new one unless a key with the new name already exists.")
  (define-command dbsize "Return the number of keys in the current database.")
  (define-command expire :boolean (key :key) (seconds :integer) "Expire key in a number of seconds from now.")
  (define-command ttl (key :key) "Get the number of seconds from now until expiry.")
  (define-command select (index :integer) "Select the database having the specified index.")
  (define-command move :boolean (key :key) (dbindex :integer) "Move the key from the currently selected database to a database specified by index.")
  (define-command flushdb "Remove all the keys of the currently selected database.")
  (define-command flushall "Remove all the keys from all the databases.")
  
  ;; Commands operating on string values (incl. pseudo-integers)
  
  (define-command set (key :key) (value :bulk) "Set a key to a string value.")
  (define-command get (key :key) "Return the string value of the key.")
  
negative.code:    #:decrby
     #:append
     #:substr
     #:bitcount
     #:getbit
     #:setbit
     #:getrange
     #:setrange
     #:strlen
     #:psetex
     ;; Commands operating on lists
     #:rpush
     #:rpushx
     #:lpush
     #:lpushx
     #:llen
     #:lrange
     #:ltrim
  