code: function index_capture (capture) {
  
      function server_sortfunc (a, b) {
        return capture.sessions[a[0]][a[1][a[1].length - 1]].start -
               capture.sessions[b[0]][b[1][b[1].length - 1]]
      }
  
      function conn_sortfunc (a, b) {
        return a.start - b.start;
      }
  
      var servers = [];
      var start;
      var end;
      for (var server_id in capture.sessions) {
        if (capture.sessions.hasOwnProperty(server_id)) {
          var conns = [];
          for (var conn_id in capture.sessions[server_id]) {
            if (capture.sessions[server_id].hasOwnProperty(conn_id)) {
              var conn = capture.sessions[server_id][conn_id];
              if (conn.http_reqs.length) {
                conns.push(conn);
              }
            }
          }
          conns.sort(conn_sortfunc);
          var conn_ids = [];
          conns.forEach(function (conn) {
            conn_ids.push(conn.local_port);
            
          })
  
          if (conn_ids.length) {
            if (! start || conns[0].start < start) {
              start = conns[0].start || capture.start;
            }
            if (! end || conns[conns.length - 1].end > end) {
              end = conns[conns.length - 1].end || capture.end;
            }
            servers.push([server_id, conn_ids]);
          }
        }
      }
      servers.sort(server_sortfunc);
      return {
        start: start,
        end: end,
        servers: servers
      };
    }
docs: Given a hash of {server: {conn_id: [...]}}, return an ordered list of [server_name, [conn_id1...], start], based upon first connection.