Check if cookies[sessionKey] exists

[yagop]

It happens that if session cookie is not provided, server fails. This happens if you restart the server with authentication enabled after being disabled.

[yagop]

This is the error :

./bin/frontail /tmp/debug.log -U a -P b
/tmp/frontail/node_modules/connect/lib/utils.js:199
  return 0 == str.indexOf('s:')
                 ^

TypeError: Cannot read property 'indexOf' of undefined
    at Object.exports.parseSignedCookie (/tmp/frontail/node_modules/connect/lib/utils.js:199:18)
    at Array.io.use (/tmp/frontail/index.js:73:41)
    at run (/tmp/frontail/node_modules/socket.io/lib/namespace.js:116:11)
    at Namespace.run (/tmp/frontail/node_modules/socket.io/lib/namespace.js:128:3)
    at Namespace.add (/tmp/frontail/node_modules/socket.io/lib/namespace.js:157:8)
    at Client.connect (/tmp/frontail/node_modules/socket.io/lib/client.js:75:20)
    at Server.onconnection (/tmp/frontail/node_modules/socket.io/lib/index.js:317:10)
    at emitOne (events.js:96:13)
    at Server.emit (events.js:191:7)
    at Server.handshake (/tmp/frontail/node_modules/engine.io/lib/server.js:309:8)

[mthenw]

Thanks!