python: Update to 2.7.17, refresh patches

python: Update to 2.7.17, refresh patches

Patches already merged and so removed:
* 019-bpo-36216-Add-check-for-characters-in-netloc-that-normalize-to-separators-GH-12216.patch
* 020-bpo-36216-Only-print-test-messages-when-verbose-GH-12291.patch
* 021-2.7-bpo-35121-prefix-dot-in-domain-for-proper-subdom.patch
* 027-bpo-38243-Escape-the-server-title-of-DocXMLRPCServer.patch
* 028-bpo-34155-Dont-parse-domains-containing-GH-13079.patch

Patches no longer necessary and so removed:
* 017_lib2to3_fix_pyc_search.patch

Signed-off-by: Jeffery To <jeffery.to@gmail.com>
(cherry picked from 83b300aa83f3cf663747998f4500a8592acf9959)