If your are not using the OpenResty
packages, you must apply our OpenSSL patches to the
OpenSSL source tree before building it in order to support yielding operations
openresty-openssl pre-built packages already include these patches.
Additionally, if you are not using an official OpenResty release, you must also apply our NGINX core patches yourself.
For OpenSSL 1.1.1c or later, apply this patch.
For OpenSSL 1.1.0c or earlier, apply this patch.
For OpenSSL 1.1.0d or later, apply this patch.
For OpenSSL 1.0.2, apply this patch.