docs: function load(match) {
    match = match || this.conf.match;
    for(var z in process.env) {
      if(match instanceof RegExp) {
        if(match.test(z)) {
          this.set(z.toLowerCase(), process.env[z]);
        }
      }else{
        this.set(z.toLowerCase(), process.env[z]);
      }
    }
  
    // expand out camel case strings using another delimiter
    if(this.conf.expand && this.conf.expand.delimiter) {
      var o = {}, k, v, val;
      for(k in this) {
        val = this[k];
        v = delimited(k, this.conf.expand.delimiter);
        if(typeof this.conf.expand.transform === 'function') {
          v = this.conf.expand.transform(v);
        }
  
        this.set(v, val);
        delete this[k];
      }
    }
  }