Cookie name with illegal characters

[PabloMG]

The Cookie constructor only admits cookie names that are compliant with RFC 2109. The servlet name is used to rename the cookie in getCookieNamePrefix, but if the servlet name contains illegal characters (most likely a white space), then the constructor will throw an exception.

I suggest that illegal characters are replaced by some other character while renaming the cookie.

Thanks.

[dsmiley]

Thanks for reporting. PR welcome