Throw Error When Window Size Exceeded

[bendangelo]

I tried sending data larger than the default window size. In this case an error should be thrown or something logged.

For example Incoming frame of size 96014 exceeds local window size of 65535.. What happens now is the whole server crashes with an overflow error.

On an other note, it would be good to be able to set the window size.

Example: https://github.com/grpc/grpc-go/pull/1210/files