Add tests for long configuration lines with backslashes

Introduce new test files to verify behavior with config lines longer than 512 characters containing backslashes. Updated test plan to

Add tests for long configuration lines with backslashes

Introduce new test files to verify behavior with config lines longer than 512 characters containing backslashes. Updated test plan to include these new test scenarios.

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/24890)

show more ...