GSSAPI Authentication Handler for Requests

requests-gssapi is an HTTP library that extends `python-requests` to provide optional GSSAPI authentication support, including mutual authentication. It acts as a fully backward-compatible shim for the older `requests-kerberos` library, allowing for a seamless transition. The current version is 1.4.0 and requires Python >=3.8. It is actively maintained with releases occurring as needed.