chore: Allow OpenSSL license (needed for ring and aws-lc-sys crates)

[sbernauer]

Came up in stackabletech/operator-rs#907 (comment)

error[rejected]: failed to satisfy license requirements
  ┌─ registry+https://github.com/rust-lang/crates.io-index#[email protected]:4:44
  │
4 │ license = "ISC AND (Apache-2.0 OR ISC) AND OpenSSL"
  │            ────────────────────────────────━━━━━━━
  │            │                               │
  │            │                               rejected: license is not explicitly allowed
  │            license expression retrieved via Cargo.toml `license`
  │
  ├ OpenSSL - OpenSSL License:
  ├   - FSF Free/Libre
  ├ aws-lc-sys v0.22.0
    └── aws-lc-rs v1.10.0
        ├── rustls v0.23.15
        │   ├── hyper-rustls v0.27.3
        │   │   └── kube-client v0.96.0
        │   │       ├── kube v0.96.0
        │   │       │   ├── stackable-certs v0.3.1
        │   │       │   │   └── stackable-webhook v0.3.1
        │   │       │   │       └── (dev) stackable-telemetry v0.2.0
        │   │       │   │           └── stackable-webhook v0.3.1 (*)
        │   │       │   ├── stackable-operator v0.81.0
        │   │       │   │   ├── stackable-certs v0.3.1 (*)
        │   │       │   │   ├── (dev) stackable-operator-derive v0.3.1
        │   │       │   │   │   └── stackable-operator v0.81.0 (*)
        │   │       │   │   └── stackable-webhook v0.3.1 (*)
        │   │       │   ├── stackable-shared v0.0.1
        │   │       │   │   ├── stackable-operator v0.81.0 (*)
        │   │       │   │   ├── stackable-versioned v0.4.1
        │   │       │   │   │   └── (dev) stackable-versioned-macros v0.4.1
        │   │       │   │   │       └── stackable-versioned v0.4.1 (*)
        │   │       │   │   └── stackable-versioned-macros v0.4.1 (*)
        │   │       │   ├── stackable-versioned v0.4.1 (*)
        │   │       │   ├── stackable-versioned-macros v0.4.1 (*)
        │   │       │   └── stackable-webhook v0.3.1 (*)
        │   │       └── kube-runtime v0.96.0
        │   │           └── kube v0.96.0 (*)
        │   ├── kube-client v0.96.0 (*)
        │   └── tokio-rustls v0.26.0
        │       ├── hyper-rustls v0.27.3 (*)
        │       ├── stackable-certs v0.3.1 (*)
        │       └── stackable-webhook v0.3.1 (*)
        └── rustls-webpki v0.102.8
            └── rustls v0.23.15 (*)

[soenkeliebau]

stackabletech/operator-rs#907 (comment)

[soenkeliebau]

ping @lfrancke for potential veto, I'd be happy merging this

[lfrancke]

I did not read this but I trust you. So go ahead.

[sbernauer]

So, it turns out both the aws-lc-sys and ring crates need the OpenSSL license. So I'd say we need to allow it in any case...

https://github.com/aws/aws-lc-rs/blob/cdb1651d7398148688fa4c0106135b4a82ec1e49/aws-lc-sys/Cargo.toml#L9
and
https://github.com/briansmith/ring/blob/main/LICENSE

@soenkeliebau can we merge this?

Pending answers to open question.

[NickLarsenNZ]

LGTM.

Both @soenkeliebau and @lfrancke have said they're fine with it.