Combinations of these values describe the features with which libgit2 was compiled
If set, libgit2 was built thread-aware and can be safely used from multiple threads.
If set, libgit2 was built with and linked against a TLS implementation. Custom TLS streams may still be added by the user to support HTTPS regardless of this.
If set, libgit2 was built with and linked against libssh2. A custom transport may still be added by the user to support libssh2 regardless of this.
If set, libgit2 was built with support for sub-second resolution in file modification times.