[ANN] OpenResty 1.21.4.2 released

[Jiahao Wang]

Hi folks,

I am happy to announce the new formal release, 1.21.4.2, of our OpenResty
web platform based on NGINX and LuaJIT. You can check the full release note
here:

http://openresty.org/en/ann-1021004002.html

You can download the software packages here:

http://openresty.org/en/download.html

The highlights of this release include:

- LuaJIT
    - Avoid negation of signed integers in C that may hold INT*_MIN, since
      recent C compilers 'take advantage' of the undefined behavior, this
      completely changes the meaning of expressions like (k == -k).
    - Correct fix for stack check when recording BC_VARG.
    - Fix trace join to BC_JLOOP originating from BC_ITERN.
    - Fix math.floor() and math.ceil().
    - Many fixes imported from Mike Pall's upstream
https://github.com/luajit/luajit repository.
- Fixed a bug that uses memory after free when encountering an invalid
IF-Match request header.
- Implements monotonic_msec() and monotonic_time() in resty.core.time.
- Includes Apple Silicon FFI ABI limitation workaround.
- Reimplemented tcpsock:sslhandshake, coroutine wrapper, and
ngx.req.is_internal with FFI.
- SSL/TLS supports passphrase protected private key.
- Fixes a segmentation fault when getting headers via ngx.req.raw_header
with
  malformed requests.
- Fixed potential null pointer dereference.
- lua-cjson module
    - empty_array can not work on Apple because cjson did not compare light
userdata
      address with masked address. Since we used json_lightudata_mask when
creating
      lightuserdata, same mask should be applied when comparing the return
of touserdata.
- headers-more-nginx-module module
    - Fixes crashes while accessing uninitialized pointers.
- lua-resty-websocket module
    - Adds mtls client cert support.
- lua-resty-memcached module
    - Implements init_pipeline(), commit_pipeline(), and cancel_pipeline().

For a comprehensive list of changes, please refer to the provided webpage.

Enjoy!

Best regards,
Jiahao
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