ANN: New OpenResty 1.17.8.1 release.

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+<!---
+    @title         OpenResty 1.17.8.1 Released
+    @creator       Yichun Zhang
+--->
+
+[% major_ver = "1.17.8"; version = major_ver _ ".1" %]
+We are happy to announce the new formal release, [% version %], of the
+OpenResty web platform based on NGINX and LuaJIT.
+
+[Download this version here](download.html).
+
+The (portable) source code distribution, the Win32/Win64 binary
+distributions, and the pre-built binary Linux packages for Ubuntu,
+Debian, Fedora, CentOS, RHEL, Alpine, Amazon Linux are provided on this
+[Download page](download.html).
+
+This is the first OpenResty release based on the nginx [% major_ver %] core.
+
+# Acknowledgments
+
+Special thanks go to all our developers, sponsors, and contributors! Also thanks Thibault Charbonnier,
+Junlong Li, and Lujia Zhai for their help in preparing this release.
+
+# Version highlights
+
+The highlights of this release candidate are:
+
+* Based on the very recent mainline [NGINX](nginx.html) core [% major_ver %].
+* Support for OpenSSL 1.1.1 by upgrading the OpenSSL patches.
+* Dropped support for PUC-Rio Lua; from now on, only [LuaJIT](https://github.com/openresty/luajit2#readme) 2.x is supported.
+* Dropped the `dtrace` and `gcc-maybe-uninitialized-warning`
+  [NGINX](nginx.html) core patches, and applied the new
+  `init_cycle_pool_release` patch. Additionally, all versions of the OpenSSL
+  patches are now bundled in the final release tarball.
+* Reduced the final release tarball size from 4.7MB down to 3.5MB.
+* [ngx_lua](https://github.com/openresty/lua-nginx-module#readme)
+    * Mandatorily load [lua-resty-core](https://github.com/openresty/lua-resty-core)
+      and switched to the FFI-based API when available. Many old CFunction
+      implementations have been removed, and
+      [lua_load_resty_core](https://github.com/openresty/lua-nginx-module#lua_load_resty_core)
+      has been deprecated.
+    * Made the `coroutine.wrap()` API propagate errors to its parent coroutine,
+      aligning with standard Lua behavior. This change may be breaking for some
+      applications relying on the previous - but invalid - behavior of [ngx_lua](https://github.com/openresty/lua-nginx-module#readme).
+    * Fixed several compilation errors for static PCRE builds and [LuaJIT](https://github.com/openresty/luajit2#readme) [FFI](http://luajit.org/ext_ffi.html)
+      checks.
+* [ngx_stream_lua](https://github.com/openresty/stream-lua-nginx-module#readme)
+    * Ported many features from the
+      [ngx_lua](https://github.com/openresty/lua-nginx-module#readme) module,
+      including:
+        * Mandatorily load [lua-resty-core](https://github.com/openresty/lua-resty-core)
+          and switched to the FFI-based API when available. Many old CFunction
+          implementations have been removed, and
+          [lua_load_resty_core](https://github.com/openresty/lua-nginx-module#lua_load_resty_core)
+          has been deprecated.
+        * Made the `coroutine.wrap()` API propagate errors to its parent coroutine,
+          aligning with standard Lua behavior. This change may be breaking for some
+          applications relying on the - invalid - previous behavior of [ngx_stream_lua](https://github.com/openresty/stream-lua-nginx-module#readme).
+        * Added the `pool_size` and `backlog` options to the [tcpsock:connect()](https://github.com/openresty/lua-nginx-module#tcpsockconnect) API.
+        * Enabled many FFI-based APIs for the stream subsystem including
+          `ngx.worker.*`, `ngx.var`, `ngx.ctx`, and many more...
+        * Fixed several compilation errors for static PCRE builds and [LuaJIT](https://github.com/openresty/luajit2#readme) [FFI](http://luajit.org/ext_ffi.html)
+          checks.
+        * Ported more features and bugfixes from previous releases of the
+          [ngx_lua](https://github.com/openresty/lua-nginx-module#readme) module...
+* [lua-resty-core](https://github.com/openresty/lua-resty-core#readme)
+    * Implemented the new `ngx_req.add_header()` API, similar to
+      `ngx_resp.add_header()`.
+    * New features for the `ngx.pipe` API with support for environment
+      variables, timeouts, and more.
+    * Updated the `ngx_ssl.get_tls1_version_str()` API to recognize TLS 1.3
+      connection.
+* [LuaJIT](https://github.com/openresty/luajit2#readme)
+    * Increased the maximum number of allowed upvalues from 60 to 120.
+    * Initial support for x390x architectures.
+    * Many fixes imported from Mike Pall's upstream [LuaJIT](https://github.com/openresty/luajit2#readme) repository.
+
+# Full Change logs
+
+Complete change logs since the last (formal) release, [% version %], can be browsed
+in the page [Change Log for [% major_ver %].x](changelog-1017008.html).
+
+# Testing
+
+We have run extensive testing on our Amazon EC2 test cluster and
+ensured that all the components (including the Nginx core) play well
+together. The latest test report can always be found here:
+
+https://qa.openresty.org/
+
+We also always run our OpenResty Edge commercial software based on the
+latest open source version of OpenResty in our own global CDN network
+(dubbed "mini CDN") powering our openresty.org and openresty.com
+websites. See https://openresty.com/ for more details.
+
+# Community Support
+
+See the [Community Page](community.html).
+
+# Commercial Support
+
+Commercial technical support and real-time noninvasive online monitoring and profiling
+solution is provided through the official [OpenResty XRay](https://openresty.com/en/)
+product.
+
+# Feedback
+
+Feedback on this release is more than welcome. Feel free to create new
+[GitHub issues](https://github.com/openresty/openresty/issues) or send emails to one of our [mailing lists](community.html).