- update to 1.25.9:
* Added ``InvalidProxyConfigurationWarning`` which is raised when
erroneously specifying an HTTPS proxy URL. urllib3 doesn't currently
support connecting to HTTPS proxies but will soon be able to
and we would like users to migrate properly without much breakage.
* Drain connection after ``PoolManager`` redirect (Pull #1817)
* Ensure ``load_verify_locations`` raises ``SSLError`` for all backends (Pull #1812)
* Rename ``VerifiedHTTPSConnection`` to ``HTTPSConnection`` (Pull #1805)
* Allow the CA certificate data to be passed as a string (Pull #1804)
* Raise ``ValueError`` if method contains control characters (Pull #1800)
* Add ``__repr__`` to ``Timeout`` (Pull #1795)