Consume buffer as soon as we know there is no boundary there, no need to delay until next chunk arrives.
This prevents stall where buffer fills up in one go and next chunk never arrives.

CL: Fix an edge case in multipart HTTP upload parsing

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In preparation for making moving to lib.
Reduce amount of makefile copypasta a bit.

CL: none

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 * Limit total amount of headroom, in absolute terms (`MBUF_SIZE_MAX_HEADROOM`).
 * If unable to allocate with headroom, fall back to allocating the required minimum.
 * For mOS, set default `MBUF_SIZE_MULTIPLIER` to 2 to avoid floating point operations.
   Since max headroom size is now capped to 128 bytes, this will not result in much of a bloat.

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mongoose: fix formatting

mongoose: fix formatting

mongoose: remove debugging messages

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PUBLISHED_FROM=00e8634913232eb2e50a0d739f85e81706dbc400

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freshen: implement ota rollback

freshen: api for rpc

freshen: implement rpc api (without transport)

PUBLISHED_FROM=9f935f676161c81464a0dc53d5d8d085b2437ffb

PUBLISHED_FROM=9a81cc34aa0039a75c851bc3685055f46936252e

CL: Fix mg_socketpair for lwip + UDP

PUBLISHED_FROM=6dd09136b3837016026523fb34acb5cc893cadbe

Fixes https://github.com/cesanta/mongoose-os/issues/394

CL: Fix buffer size passed to inet_ntop()

PUBLISHED_FROM=4a6702527627ccbb780f45200274b09a28be69ee

E.g. if `ASSERT_EQ(myfunc(), 123)` fails, `myfunc()` would be invoked again to print the actual value.
This can cause confusion sometimes.
To avoid this, we cast arguments to double, which is wide enough for most cases and we provide a variant for 64 bit value types for when it's not.
We also perform a check and fail if argument to the check results in loss of precision.

CL: none

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CL: none

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Which is a replacement of (deprecated) `mg_http_parse_header`, but,
similarly to `asprintf`, allocates a new buffer if the client-provided
one is not large enough.

Also use it throughout mongoose code, and thus some header-related
limitations are removed; in particular,
https://github.com/cesanta/mongoose/issues/813 is fixed.

CL: Mongoose Web Server: Deprecate `mg_http_parse_header()` and implement `mg_http_parse_header2()` instead, which allocates a new buffer if the client-provided one is not large enough (similarly to `asprintf`).
CL: Mongoose Web Server: Fix limitations of header value lengths, e.g. when parsing authentication headers such as nonce, etc.

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CL: none

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To properly fail a test in a subroutine, return value needs to be passed up.
This snippet makes it short.

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PUBLISHED_FROM=3cd6dd7f04b650ca637788d1017b6b5146c79569

CL: Mongoose Web Server: Add UDP client example

Resolves https://github.com/cesanta/mongoose/issues/886

PUBLISHED_FROM=fcce2f1de3a800147e9246ffa01c428c1b8f552b

In certain files it was necessary to make tests work from public
mongoose repo, so this commit makes things consistent.

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Even though it makes no prectical difference due to the way amalgamation works

CL: none

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CL: none

PUBLISHED_FROM=d6ebe5fa88c61ae3b8569897d9b09d54610bec73

CL: Mongoose Web Server: Remove tunneling functionality which was used by nobody

PUBLISHED_FROM=38b9e8ae7b0a5a1dbba5cff4074843dc681267d3

CL: Mongoose Web Server: Publish sources and tests

Resolves https://github.com/cesanta/mongoose/issues/745

PUBLISHED_FROM=7ecd7a3c518cfa614a6ba0838678dcb91b75a8c0

Before it resulted in an endless recursion.

Resolves https://github.com/cesanta/mongoose/issues/871

CL: Mongoose Web Server: Fail if passed a NULL handler to `mg_bind` or `mg_bind_opt`.

PUBLISHED_FROM=376e5d330a643fa530f6a27a422a1500f986c721

CL: Mongoose Web Server: Digest authentication: Fix nonce validity check (expired nonce or nonce from the future did not cause the the check to fail)
CL: Mongoose Web Server: Digest authentication: Fix nonce request value; it worked before because nonce validity check was broken as well
CL: Mongoose Web Server: Digest authentication: Add `nonce` argument to `mg_http_create_digest_auth_header()`: clients should use the value received from the server's authentication request.

Resolves https://github.com/cesanta/mongoose/issues/809

PUBLISHED_FROM=5e59f90ed6b2a4311ed6763159da81c2aaf6af4c

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

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`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

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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

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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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