Update to 1.93

Upstream changes:
1.93  Jan 19, 2021
        - put_content was not handling optional arguments correctly
          (bug report by Bas van Sisseren).

1.92_03 Oct 1, 2020
        - Write buffer could grow uncontrolled after a connection
          lost error (bug report by Jozef Kutej, #gh17).

1.92_02 Jun 25, 2020
        - Fix handling of out of order responses.

1.92_01 Jun 24, 2020
        - Add support for receiving out of order responses from the
          server (bug report by Dimitar Kolev #rt130641 and ftumsh
          #rt132768).

(wen)