Removing support for BRG library

[nmoinvaz]

I am planning on removing support for BRG library since I have native crypto implementations on the major platforms. If one of the crypto implementations is not found, it will disable encryption support. This should remove both the MZ_BRG and MZ_LIBBSD cmake options as libbsd will no longer be necessary.

I would like to move to third-party libraries that have large adoption and active maintenance.

[Nekto89]

I'm currently trying to switch from old minizip 1.10 to your version 2.10.5. Have I understood correctly, that on Linux the only way to get old MZ_PKCRYPT working (without AES) is to use BRG or OpenSSL? So with removal of BRG there will be only one option - OpenSSL?

[nmoinvaz]

Yes for Linux. Windows and macOS have their own native crypto libraries. We can add support for another popular crypto library if necessary.

[gvollant]

Is there a specific problem with BRG?

[nmoinvaz]

It requires two separate repositories (1 for AES and 1 for SHA1) and it also requires libbsd for cryptographic random function. I would like to simplify by using libraries that contain all those such as openSSL or mbedTLS.

[nmoinvaz]

I have made it so it is not necessary to use OpenSSL to get MZ_PKCRYPT support.