[pull] master from vapor:master (#68)

* Remove double quotes from cooke value (vapor#2215)

* remove double quotes from cookie value

* naming

* naming

* Expose initializer of Validator (vapor#2232)

vapor#2231

Co-authored-by: seeppp <jonas.schoch@naptics.ch>

* Allow WebSocket maxFrameSize to be configured (vapor#2195)

* Allow WebSocket maxFrameSize to be configured.

* Change maxFrameSize to an enum instead of optional.

* Implement `.hex`, `hexEncodedString()`, and `hexEncodedBytes()` on Sequence instead of restricting them to Collection. (vapor#2249)

- Make `hexEncodedBytes()` public, why wouldn't it be?
- Specialize `hexEncodedBytes()` on `Collection` to use a (theoretically) more efficient method. It's probably a completely unmeasurable difference in practice.
- Add unit test to make sure it works on `Sequence`s.

* close mode output keep-alive (vapor#2257)

* fix body stream leak (vapor#2258)

Co-authored-by: Tanner <tannernelson@gmail.com>
Co-authored-by: Seeppp <jonas.schoch@icloud.com>
Co-authored-by: seeppp <jonas.schoch@naptics.ch>
Co-authored-by: Bridger Maxwell <bridger.maxwell@gmail.com>
Co-authored-by: Gwynne Raskind <gwynne@darkrainfall.org>