https://github.com/boto/boto/commit/4f4dcb31fe852c05ce19b44eb9d5b5d747e36f7c
https://github.com/boto/boto/pull/2718

From 4f4dcb31fe852c05ce19b44eb9d5b5d747e36f7c Mon Sep 17 00:00:00 2001
From: Lee Ball <43632885+catleeball@users.noreply.github.com>
Date: Mon, 10 Jun 2019 16:02:53 -0700
Subject: [PATCH] Remove `strict=True` from http_client (#6)

In Python 3.4, the `strict` kwarg was removed[1]. We are removing it
here too.

Alternatively, we can leave in `strict=True` for 2.x, but I chose to
remove it entirely to maintain consistent behavior across versions.

[1]: https://docs.python.org/3/library/http.client.html
---
 boto/connection.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/boto/connection.py b/boto/connection.py
index c731173bb4eb..54e26fb2de16 100644
--- a/boto/connection.py
+++ b/boto/connection.py
@@ -807,7 +807,7 @@ class AWSAuthConnection(object):
                 sock.sendall(six.ensure_binary("\r\n"))
         else:
             sock.sendall(six.ensure_binary("\r\n"))
-        resp = http_client.HTTPResponse(sock, strict=True, debuglevel=self.debug)
+        resp = http_client.HTTPResponse(sock, debuglevel=self.debug)
         resp.begin()
 
         if resp.status != 200:
-- 
2.28.0