CL: mg: Check HTTP chunk size, ensure it's reasonable

PUBLISHED_FROM=d9f6babd314c092b42ce9e7fe31d6b30a38366a2

Clean the HTTP connection state when ia request/response has been fully
buffered and handler invoked.

Fixes https://github.com/cesanta/mongoose/issues/971

CL: mg: Fix handling of keepalive HTTP requests/responses

PUBLISHED_FROM=70c854aa306aacb9161f6ee48841f38dc0312e6b

Go back to Ubuntu 16.04 and older gcc-arm (4.9.3).

Boot loader just won't run when compiled with newer GCC (7.x).
It's likely that it can be fixed with compile switches but I couldn't figure it out quickly, so going to just downgrade for now to get it back to workign state.

CL: CC3200: Fix boot loader regression

PUBLISHED_FROM=b70b03bd17e03c7dae02328b32b855f3ca3ad6a9

CL: Add mgos_gpio_blink()

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mbedTLS is just another lib now

CL: Use mbedTLS from mongoose-os-libs/mbedtls

PUBLISHED_FROM=bae4739d22e871bd268b8a3233dbb69634770243

CL: Integrate https://github.com/cesanta/mongoose/pull/667, fix documentation

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CL: none

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CL: Docs nits

PUBLISHED_FROM=1a2fc8080d94673acf300c6f07aba3a1e6272295

 * Update CubeL4 to 1.13.0
 * Rebuild OurTLS with `-DMBEDTLS_X509_CA_CHAIN_ON_DISK`
 * Add `-Wextra` and fix build issues

CL: Update STM32 build image

PUBLISHED_FROM=a7eacff7580bab6c6e40bdaf6164df575a717c55

Listeners still TODO

CL: ISM43XXX networking support (TCP, UDP client)

PUBLISHED_FROM=b58ba88b9e6bd7b55ccb607d0b69cea98cb52fa5

CL: STM32: Make LWIP optional

PUBLISHED_FROM=eebffe7800a74d7b69aafd95e476b2e90328be98

Can be used for cases where device has no networking but mongoose is still needed for its event loop.

CL: mg: Add net_if_null, a no-op net interface

PUBLISHED_FROM=e79b4a8667508bbde1437dda9dad77ce3a3aa630

 * Change return type of mg_mgr_poll to return number of events
 * Add mg_mgr_min_timer
 * Refactor main poll loop to remove LwIP-specific stuff

CL: Refactor mg polling

PUBLISHED_FROM=dc94618b32fa3c84a2f053bd04d134297780ec82

CL: Fix https://github.com/cesanta/mongoose/issues/962 - file upload on windows

PUBLISHED_FROM=85688eee147a1df468cca92f4ac61526ce9c02bf

A smattering of other related changes

CL: STM32 OTA support for L475-IOT01 and DISCO-F746

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CL: Mongoose 6.12

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h/t @M4GNV5

Fixes https://github.com/cesanta/mongoose/issues/943
Closes https://github.com/cesanta/mongoose/issues/944

CL: mg: Don't touch send_mbuf when sending MQTT messages

PUBLISHED_FROM=da7b4f8acec2e403caa4addd5739d036a6a74c76

Fixes https://nvd.nist.gov/vuln/detail/CVE-2018-10945

CL: mg: Fix body length calculation in mg_handle_cgi

PUBLISHED_FROM=0c30cf36fdb67c75f6148468701e23d6ee72d953

Closes https://github.com/cesanta/mongoose/pull/955

CL: mg: Add host name verification for OpenSSL

PUBLISHED_FROM=e35dd636ba7ce63116f0a38031074d22f6cd5dac

CL: Make esp8266 compilation a little less verbose

PUBLISHED_FROM=0ec1412ea32243f263d52fbe0877ecca1efc5aef

Closes https://github.com/cesanta/mongoose/pull/945

CL: Fix build with CS_ENABLE_STDIO=0

PUBLISHED_FROM=7d15f17fc42241facdba5b1004b5b7f3dda599dc

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CL: Add mg_strstrip: trims whitespace at the ends of s

PUBLISHED_FROM=a7e10054ac25fa2b3a878876da93a6b30d9507b3

Use vararg macros for this.

PUBLISHED_FROM=735c40b79dedef17a1fdbb5b846e984df0ae7018

h/t @YankunLi

Closes https://github.com/cesanta/mongoose/pull/939

CL: mg: Fix a bug in mg_mgr_init_opt with opts.num_ifaces

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CL: mos support for LFS (littlefs) https://github.com/ARMmbed/littlefs

PUBLISHED_FROM=e72957b4fb2c78949af4cf6d5bfef135ddba9fd9

Do not clear buffer at the end of multipart request to allow following request to proceed.

Closes https://github.com/cesanta/mongoose/pull/940

CL: mg: Fix pipelining issue with multipart upload

PUBLISHED_FROM=cc7d38b126eaa863553ee4e124cfafcd72030fcf

CL: Add missing CC3220 sub-header to mongoose.h

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curl -F file1 -F file2 ...

Add a unit test and fix a minor memory leak when returning an error.

CL: mg_file_upload_handler: Support multiple files

PUBLISHED_FROM=5c4bf2be676346fb782e80f50f79df6a6721ac88

Set CLOSE_IMMEDIATELY flag when destroying conn.
This avoid some races in LWIP adapter.

CL: mg_lwip: Fix race during clean conenction teardown

PUBLISHED_FROM=5c67982390dfaf83527e85d1291f64c6050aa932

startup cleanup on CC3220

CL: none

PUBLISHED_FROM=0998fad82fbcdbde30dca42833f2e48d148592bf

Closes https://github.com/cesanta/mos-libs/pull/2

CL: Add MG_HIDE_SERVER_INFO

PUBLISHED_FROM=ed8a5b65f1c8238df414cd1c1f8bb1f579082f55

PUBLISHED_FROM=9997c64ed0c713b5b8b29df7a49b532e880eac53

CL: Fix TZ on ESP8266

PUBLISHED_FROM=435a501a8b52524bccb67bb5a8ae7e09dfb4d44a

CL: none

PUBLISHED_FROM=9cb4b915906d471ef5de4e0825567d0b942d3f7b

mgos_dlsym needs to include mg_str for ffi_exports to be able to use it

PUBLISHED_FROM=a2dd167c8e8f9e9b7316a856f19a4603080c3632

Enables extra compile-time checks

CL: none

PUBLISHED_FROM=9f7d658fbda5c721cf40293bf29967bb056d0437

Also remove `-O3` optimization flasg, it negates `-Os`. Saves ~400 bytes.

CL: none

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