* httpclient: use refs - httpserver: add chunks in examples
* basic https client: update cert
* debug log: read() returning -1 is usual and means "nothing to read"
* emulation on host: SSL server has never been and is now working
* style
* move SSL server certs from examples into a single place with appropriate warnings
* web-hello-servers: make chunks bigger
* factorize template declaration
* http-client: add getString(pre-reservation)
* mock: add umm_info()
* style
* comment API in example
* style
* fix per review
* webhook api
* simplify webserver debug printouts, move text to flash
* Hook examples in HelloServer example
* print executable code address in example
* simplify example per @mcspr suggestion
* Add const char* content to ESP8266WebSerer::send()
Supercedes #3492
Allow sending raw binary data or strings directly without conversion to
a String to reduce memory overhead when possible.
From original @timw1971 PR #3492
Added public functions to allow content to be uploaded using const
char*. For some cases, this can remove the need for content to be copied
into a String, and thus can be considerably more space-efficient.
* Fix example formatting
* Make GIF example use static const array
* Make the example really need to use const char*
Make the generated GIF dynamic in the example and move the original to
PROGMEM (since that's where const arrays like this belong).
