If a system OpenSSL version was not found or is at version that is incompatible with a Ruby being installed, ruby-build would typically download and compile a new OpenSSL version scoped to that Ruby installation.
Now the `needs_openssl` condition will also check for Homebrew-installed OpenSSL and automatically link to the first one found that satisfies the version requirement. This primarily helps speed up Ruby installation on macOS where the system OpenSSL is never compatible and where Homebrew is a de-facto standard package manager.
When stub patterns were broken down into an array, they were
accidentally subject to glob expansion. E.g., a pattern '*' might expand
to whatever is in the current directory. This is unwanted, as we need to
preserve patterns as-is.
No more awkward juggling of PATH entries and preset stubs in version
control. Commands are stubbed by symlinking the main stub from a
temporary `$TMP/bin` directory that's added once to PATH in tests.
