* Rewrite HTTPClient chunked transfer-encoding
Fixes#3029
The chunked decoder seems to have had some race conditions resulting in
lost data.
The HTTPClient::getStreamPtr returned the raw WiFiClient which included
all of the chunked block size markers, requiring the user to manually
parse the chunked encoding.
Remove the existing chunked handling, add a HTTPStream as a WiFiClient
subclass. The HTTPClient will return this HTTPStream which will always
properly cut out chunk markers when present (and pass things raw for
non-encoded streams). Use this new HTTPStream class to replace the
existing handling in HTTPClient
Update the fingerprint in the StreamHTTPSClient example because their
cert was updated.
* Astyle
* Add block write passthru
* Add other WiFiClient passthru calls
Remove the need to have a separate WiFiClient that's destroyed after
the HTTPClient. Let the object handle its own client, and pass through
any SSL requests.
Also supports the original ::begin methods which need a
WiFiClient(Secure) to be passed in and managed by the app.
