simplify Parser.
have the html parser say what went wrong.
don't try to parse encoded content.
remove todo, don't track this in the code.
allow to specify a max input size.
ContentTooBig parse failure and test for it.
add handling of and test for parsing content with set content-length header that exceeds limit.
add LimitedInMemoryDataSink.
use LimitedInMemoryDataSink to implement size limit for input.
Merge branch 'feature/limitHttpParse'