* 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
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.
PUBLISHED_FROM=c75b1bbbbdb294ea85075ce69b1368f115fdd1ef
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
PUBLISHED_FROM=e2b3794aaacc64633540c493194cccc62afa2077
Rationale: this is the optimisation to make JS FFI-ed API
work nicer. We don't have strucuture introspection now,
and do not generate offsets automatially. Thus, using a
stable well-known location of the parsed message body is
better, in case of number of HTTP headers macro changes.
PUBLISHED_FROM=55bf25ac77060a9c81dfecd6601f037562530801
Remove the specialized URI parser, clean up code a bit.
Fix parsing of URIs with IPv6 hosts (http://[2001:2:3::4]:567/)
PUBLISHED_FROM=968ad97585d928123106ce3828920ee073113f83
Also fixed a memory leak on reconnect: previously, each reconnect was
creating a `struct mg_connection` which was never reclaimed
PUBLISHED_FROM=eefdcf557e032ac81d5ed3aba55ac912e400148e
