CL: Mongoose Web Server: Websocket: Respond to Ping with Pong
CL: Mongoose Web Server: Websocket: Properly close a connection with Close frame (in response to a client's close and when protocol failure is detected)
CL: Mongoose Web Server: Websocket: Fix support of fragmented messages
CL: Mongoose Web Server: Websocket: Add support for control frames interjected in the middle of a fragmented message

PUBLISHED_FROM=e2b3794aaacc64633540c493194cccc62afa2077

`path_info` was dereferenced without checking for NULL, and a few lines
below, it was checked for NULL.

CL: none

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CL: none

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CL: none

PUBLISHED_FROM=9d68cdc298c520798468b43a19c84251bd0c21b4

Integrates https://github.com/cesanta/mongoose/pull/884
Closes https://github.com/cesanta/mongoose/issues/883

CL: Mongoose Web Server: Don't use user_data in mqtt server

PUBLISHED_FROM=7785784a766e0ba7514bbba604cde14e7bad3f73

CL: Mongoose Web Server: Fix mg_parse_multipart in case of malformed request

PUBLISHED_FROM=9b33b03e9ab2ca204ad2f8d061df169246644072

CL: none

PUBLISHED_FROM=9c13882517374644c6d799976f1048f04ae446d7

CL: Mongoose Web Server: Fix publish-subscribe example

PUBLISHED_FROM=04fdb66c1d4eb56798a5be2634f9f9bb2f18f288

CL: Mongoose Web Server: Fix socket leak when there are too many open file descriptors

Fixes https://github.com/cesanta/mongoose/issues/870

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PUBLISHED_FROM=2b18b68e500a3d6123e80bd4db19e3b3b9900012

Fixes https://github.com/cesanta/mjs/issues/82
Integrates https://github.com/cesanta/mjs/pull/85

PUBLISHED_FROM=2f5f50c25ec1c92fdfb783cd95cb57f0cb20642b

CL: Fix OOB access in mg_match_prefix_n().
    Made mg_match_prefix_n() return non-negative result.

PUBLISHED_FROM=611454df6a6c55bfa7ddf05e7d268a86fa0457a8

CL: Fix TCP RX path regression in SSL mode

PUBLISHED_FROM=2cfdb33e5f711bbc4b98e2d24ba3377de0f1d3c5

CL: - Mongoose Web Server: close undrained and stuck http connections

PUBLISHED_FROM=a11656b195dbe2ef8473455a171a583e37cedb2c

h/t @kzyapkov

PUBLISHED_FROM=d15a5a0057f69f2f755af6436e676b1b179d069d

AWS MQTT connection works

Also fixes https://github.com/mongoose-os-libs/ethernet/issues/1 (because why not).

PUBLISHED_FROM=7b0fa8894f2127335d075f2a97fcd37b932006b2

Standardize common packages in build images, to make better use of Docker image cache.

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PUBLISHED_FROM=de02f5cc6a9d854e92cf674e5382f793709da831

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PUBLISHED_FROM=0a321ace3753a518e299b795fb7a4eed19708bb6

PUBLISHED_FROM=cd059adee921dd10fd89100b0e2500ff8d7743eb

PUBLISHED_FROM=3b75fd8247ba9028e0ef0c3e211e7c1a80013951

PUBLISHED_FROM=971951e1eeb82078b986cd6e25e52cfc1ccef286

PUBLISHED_FROM=2c176091ffb6c7c5cfe8ea4f05b6109e00b33383

PUBLISHED_FROM=e5b829d93ecf946e5bdbbf33132be7068ffe0dd2

PUBLISHED_FROM=1bfc6e332f56b68eb6155bb729a97a0d8d5a316c

To avoid name clashes.

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PUBLISHED_FROM=b85fe1ee1e7bae4528c1240d8531c410728d0709

2.0 redefined LWIP_VERSION in a way that is no longer compatible with use by preprocessor (boo).
also, tcp_pcb.acked is gone, but we only use it for debug, so it doesn't matter.

PUBLISHED_FROM=776f90a08bd5024fa8a61dae257af6c60ec6710d

ECDHE is way too slow on ESP8266 w/o cryptochip, this sometimes results in WiFi STA deauths.
Disable DHE completely because it's just hopelessly slow.

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