Install script: curl fails TLS verification for swamp.club (certificate chain)

Summary

Running the documented install command fails during the HTTPS fetch to swamp.club with curl error 60 (unable to verify the server certificate / unable to get local issuer certificate).

Documented command

curl -fsSL https://swamp.club/install.sh | sh

Observed behavior

• curl exits with code 60
• Error text includes: SSL certificate problem: unable to get local issuer certificate

Environment

• OS: macOS (darwin 25.x)
• curl: system / default (as shipped with the OS)

Workaround used

Installing the binary directly from GitHub Releases worked (same machine, same curl), e.g.:

curl -fL -o ~/.local/bin/swamp "https://github.com/systeminit/swamp/releases/latest/download/swamp-darwin-aarch64"
chmod +x ~/.local/bin/swamp

Suggestion

If this affects other users behind strict corporate roots or incomplete chains on swamp.club, consider:

• Verifying the full certificate chain is served for swamp.club
• Or documenting the GitHub Releases fallback more prominently in the README for when the installer URL fails TLS

Happy to provide more diagnostics (openssl s_client output, etc.) if useful.

Automoved by swampadmin from GitHub issue #991