suggested api for auto_sha

gistfile1.js

var redis = require("redis"),
    client = redis.createClient();

client.auto_sha = true; /* enable transparent sha1 cache and retry of all calls to eval */

client.eval("return 1;", 0, function(err, num){..});

/* checks client.auto_sha and will then look up sha in redis.sha1cache, 
failing that will sha1 the script and cache it.  
Perform the evalsha with an auto-fallback to eval if redis returns sha1 not found.  
If the sha *is* found in redis.sha1cache, then just go ahead and call evalsha, 
also falling back to eval if it is not found.
*/

console.log(sys.inspect(redis.sha1cache));
/* { "return 1":"EA42G..." }; 
  sha hash is per-process because the luascripts a program uses are expected to be limited. 
 if the user wants to stuff data into their luascript instead of passing it in as a ARG,
 then they should have client.auto_sha = false;
*/