security/openssl: Fix detection of ARMv7/ARM64 CPU features

[allanjude]

Summary

OpenSSL assumes the same value for AT_HWCAP at Linux
So it ends up calling elf_auxv_info() with AT_CANARY which
returns ENOENT, and all acceleration features are disabled.

With this, my ARM64 test machine, the benchmark
openssl speed -evp aes-256-gcm is nearly 20x faster
going from 100 MB/sec to 2000 MB/sec

Also update the configure scripts to detect arm64-*-freebsd
rather than using BSD-generic32

PR: 259937
Sponsored by: Klara Inc.

[jrm]

20x faster is nice. You should also bump PORTREVISION.

[jrm]

Might be prudent to wait until https://github.com/openssl/openssl/pull/17079 is resolved.

[allanjude]

Update with cleaner patch and add configure scripts to enable armcap.c

[brnrd]

Awaiting comments from upstream before committing. I'm assuming this will be incorporated in next releases too.

Committing version 1.1.1l_1,1 is too beautiful a chance to let is pass me by!

[allanjude]

In D33061#746999, @brnrd wrote:

Awaiting comments from upstream before committing. I'm assuming this will be incorporated in next releases too.

Committing version 1.1.1l_1,1 is too beautiful a chance to let is pass me by!

This same patch (just the armcap bits, since we don't use the configure scripts) should land in base shortly, and get an errata notice for all supported versions.