anchor.diff:  
   Following is an example of starting a socket server with a repl listener. This can be added to any existing Clojure program to allow it to accept external REPL clients via a local connection to port 5555.
   
  -[source,clojure]
  +[source,shell]
   ----
   -Dclojure.server.repl="{:port 5555 :accept clojure.core.server/repl}"
   ----
   
   An example client you can use to connect to this socket repl is telnet:
   
  -[source,clojure]
  +[source,shell]
   ----
   $ telnet 127.0.0.1 5555
   Trying 127.0.0.1...
  
positive.code: 
  You can instruct the server to close the client socket repl session by using the special command `:repl/quit`:
  
  [source,clojure]
  ----
  user=> :repl/quit
  Connection closed by foreign host.
  
negative.code: 
  The same is also described in the usage message:
  
  [source,shell]
  ----
  Usage: java -cp clojure.jar clojure.main [init-opt*] [main-opt] [arg*]
  
  