This update for privoxy fixes the following issues:

- Update to version 3.0.31:
  - Security/Reliability (boo#1181650)
    - Prevent an assertion from getting triggered by a crafted
      CGI request.
      Commit 5bba5b89193fa. OVE-20210130-0001. CVE-2021-20217
      Reported by: Joshua Rogers (Opera)
    - Fixed a memory leak when decompression fails "unexpectedly".
      Commit f431d61740cc0. OVE-20210128-0001. CVE-2021-20216
  - Bug fixes:
    - Fixed detection of insufficient data for decompression.
      Previously Privoxy could try to decompress a partly
      uninitialized buffer.

This update was imported from the openSUSE:Leap:15.2:Update update project.