Don't freeze the options hash

[mmay]

I couldn't figure out why freezing the options hash was a good idea. Any reason why the options hash is frozen?

In my case, I want to override an option after it has already been set and instead of using an instance variable I would prefer to just override the options hash.

[sferik]

It appears that the call to freeze was added in f7d9cc6.

@josevalim Do you remember why this was necessary?

[josevalim]

It was frozen before here: f7d9cc6#diff-0065e6d4e143036f62fc86861719ddc1L117

It any case, it is probably due to safety. @mmay I think that instead of overriding it after initializing it, you should provide a class method that will build it with the proper option set in the first place?

[mmay]

Thanks for taking a look @sferik and @josevalim!

Using a class method to build the options hash is a better way to do what I wanted anyway.