DRIVERS-2679 : AC Implementation Requirements Ensure that URI parsing logic treats the delimiting slash between hosts and client options as optional E.g.: The URI string "mongodb://example.com?w=1" should parse without error and yield the same results as "mongodb://example.com/?w=1" Testing Requirements Sync connection string spec tests updated in this PR affects connection-string/tests/invalid-uris.{yml,json } and connection-string/tests/valid-options.{yml,json }