Building against BoringSSL fails, easy fix

[kmansoft]

Hello,

I'm trying to build libSRTP against BoringSSL using CMake.

Running into an issue in that CMakeLists.txt requires a specific OpenSSL version - 1.1.0 or newer - and BoringSSL doesn't define a version number, so the FindPackage here fails:

https://github.com/cisco/libsrtp/blob/main/CMakeLists.txt#L103

https://github.com/Kitware/CMake/blob/master/Modules/FindOpenSSL.cmake#L576

https://boringssl.googlesource.com/boringssl/+/HEAD/include/openssl/opensslv.h

Since OpenSSL 1.1.0 is from 25 Aug 2016, and was EOL'd in September 2019, I think it's safe to assume that any OpenSSL version would be compliant.

Would it be possible to remove the version requirement from CMakeLists.txt like this:

Current:

find_package(OpenSSL 1.1.0 REQUIRED)

Proposed fix:

find_package(OpenSSL REQUIRED)

Thank you for your consideration!

[kmansoft]

Submitted a PR - #745