winfreed.py: fix the "HTTP Error 403: Forbidden" error on some servers
authorAntonio Ospite <ao2@ao2.it>
Mon, 29 May 2017 14:00:00 +0000 (16:00 +0200)
committerAntonio Ospite <ao2@ao2.it>
Mon, 29 May 2017 14:31:07 +0000 (16:31 +0200)
Some servers require the User-Agent header.

This fixes this error:

  Downloading from https://www.sumatrapdfreader.org/dl/SumatraPDF-3.1.2-64-install.exe failed. HTTP Error 403: Forbidden


No differences found