connection.changeUser fails

[ngorchilov]

Two issues discovered with changeUser:

1. ReferenceError: Config is not defined

/z/bs/node_modules/mysql/lib/Connection.js:84
    ? Config.getCharsetNumber(options.charset)
      ^
ReferenceError: Config is not defined

1. Fixing problem as renaming Config to ConnectionConfig leads to another issue:

/z/bs/node_modules/mysql/lib/protocol/sequences/ChangeUser.js:19
  var scrambleBuff = handshakeInitializationPacket.scrambleBuff();
                                                   ^
TypeError: Cannot call method 'scrambleBuff' of undefined

[rwky]

I can replicate (and fix) 1. but I'm not getting the error in 2. Can you provide some sample code? Are you using the latest version from the master branch?

[rwky]

Ah never mind part 2 was fixed in #618. I'll create a pull request to fix 1