Provide certificates with macOS and Windows build

We have to bring our own certficates on Homebrew Python 
The certifi package brings the latest certificates on build 
This will cause the create_default_context to load it automatically
We also use this on Windows so users are always up-to-date

SABnzbd.py

@@ -1174,6 +1174,15 @@ def main():
     if not sabnzbd.WIN32 and not sabnzbd.DARWIN and not ('utf' in preferredencoding.lower() and '8' in preferredencoding.lower()):
         logging.warning(T("SABnzbd was started with encoding %s, this should be UTF-8. Expect problems with Unicoded file and directory names in downloads.") % preferredencoding)
 
+    # Load extra certificates
+    if hasattr(sys, "frozen"):
+        # The certifi package brings the latest certificates on build
+        # This will cause the create_default_context to load it automatically
+        import certifi
+        os.environ["SSL_CERT_FILE"] = certifi.where()
+        logging.info('Loaded additional certificates from %s', os.environ["SSL_CERT_FILE"])
+
+    # Extra startup info
     if sabnzbd.cfg.log_level() > 1:
         from sabnzbd.getipaddress import localipv4, publicipv4, ipv6
 
@@ -1686,9 +1695,8 @@ if __name__ == '__main__':
             main()
 
     elif getattr(sys, 'frozen', None) == 'macosx_app':
-        # OSX binary
-
         try:
+            # OSX binary runner
             from PyObjCTools import AppHelper
             from sabnzbd.osxmenu import SABnzbdDelegate
 
@@ -1713,9 +1721,7 @@ if __name__ == '__main__':
             sabApp = startApp()
             sabApp.start()
             AppHelper.runEventLoop()
-
         except:
             main()
-
     else:
         main()