Blurb release and pydoc-topics for 3.5.7 final.

Misc/NEWS.d/3.5.7.rst

+.. bpo: 36216
+.. date: 2019-03-06-09-38-40
+.. nonce: 6q1m4a
+.. release date: 2019-03-17
+.. section: Security
+
+Changes urlsplit() to raise ValueError when the URL contains characters that
+decompose under IDNA encoding (NFKC-normalization) into characters that
+affect how the URL is parsed.
+
+..
+
+.. bpo: 35121
+.. date: 2018-10-31-15-39-17
+.. nonce: EgHv9k
+.. section: Security
+
+Don't send cookies of domain A without Domain attribute to domain B when
+domain A is a suffix match of domain B while using a cookiejar with
+:class:`http.cookiejar.DefaultCookiePolicy` policy. Patch by Karthikeyan
+Singaravelan.
+
+..
+
+.. bpo: 35121
+.. date: 2018-12-30-14-35-19
+.. nonce: oWmiGU
+.. section: Library
+
+Don't set cookie for a request when the request path is a prefix match of
+the cookie's path attribute but doesn't end with "/". Patch by Karthikeyan
+Singaravelan.

Misc/NEWS.d/next/Library/2018-12-30-14-35-19.bpo-35121.oWmiGU.rst

-Don't set cookie for a request when the request path is a prefix match of
-the cookie's path attribute but doesn't end with "/". Patch by Karthikeyan
-Singaravelan.

Misc/NEWS.d/next/Security/2018-10-31-15-39-17.bpo-35121.EgHv9k.rst

-Don't send cookies of domain A without Domain attribute to domain B
-when domain A is a suffix match of domain B while using a cookiejar
-with :class:`http.cookiejar.DefaultCookiePolicy` policy. Patch by
-Karthikeyan Singaravelan.

Misc/NEWS.d/next/Security/2019-03-06-09-38-40.bpo-36216.6q1m4a.rst

-Changes urlsplit() to raise ValueError when the URL contains characters that
-decompose under IDNA encoding (NFKC-normalization) into characters that
-affect how the URL is parsed.