Use /opt/local/bin/curl on OSX instead of /usr/bin/curl
Don't know why, but /usr/bin/curl now fails to verify the cert used by common-lisp.net. Macports did too, but I've updated macports to the latest, and it doesn't seem to have that problem.
Let's see if this fixes the issue.
Git clone was also failing on OSX CI with an SSL cert problem (cert expired). Explicitly use /opt/local/bin/git.
Fixes #119 (closed).