[1.9.x] Fixed typo in docs/topics/logging.txt

    message it receives.

    If the log record contains a ``request`` attribute, the full details

    of the request will be included in the email. The email subject will be

    of the request will be included in the email. The email subject will

    include the phrase "internal IP" if the client's IP address is in the

    :setting:`INTERNAL_IPS` setting; if not, it will include "EXTERNAL IP".