[1.7.x] Fixed #24556 -- Added reminder about HTTPS to passwords docs.

Backport of 1119063 from master

docs/topics/auth/passwords.txt

@@ -8,6 +8,14 @@ tools for managing user passwords. This document describes how Django stores
 passwords, how the storage hashing can be configured, and some utilities to
 work with hashed passwords.
 
+.. seealso::
+
+    Even though users may use strong passwords, attackers might be able to
+    eavesdrop on their connections. Use :ref:`HTTPS
+    <security-recommendation-ssl>` to avoid sending passwords (or any other
+    sensitive data) over plain HTTP connections because they will be vulnerable
+    to password sniffing.
+
 .. _auth_password_storage:
 
 How Django stores passwords