[3.7] bpo-43660: Fix crash when displaying exceptions with custom values for sys.stderr (GH-25075). (GH-25085)

bpo-42988: Remove the pydoc getfile feature (GH-25015) (#25066)

[3.7] bpo-43285 Make ftplib not trust the PASV response. (GH-24838) (GH-24881) (GH-24883)

Pin test runner to Ubuntu 18 to un-break CI (GH-24715) (GH-24716)

Post release updates

[3.7] bpo-42967: only use '&' as a query string separator (GH-24297) (GH-24531)