When trying to connect to another SABnzbd instance over HTTPS, don't verify certificates.

Very few SABnzbd installations will have valid certificates.

SABnzbd.py

@@ -714,7 +714,10 @@ def is_sabnzbd_running(url, timeout=None):
     """ Return True when there's already a SABnzbd instance running. """
     try:
         url = '%s&mode=version' % (url)
+        # Do this without certificate verification, few installations will have that
+        prev = sabnzbd.set_https_verification(False)
         ver = sabnzbd.newsunpack.get_from_url(url, timeout=timeout)
+        sabnzbd.set_https_verification(prev)        
         return bool(ver and re.search(r'\d+\.\d+\.', ver))
     except:
         return False

sabnzbd/__init__.py

@@ -486,18 +486,24 @@ def guard_fsys_type():
     """ Callback for change of file system naming type """
     sabnzbd.encoding.change_fsys(cfg.fsys_type())
 
-
-def guard_https_ver():
-    """ Callback for change of https verification """
+def set_https_verification(value):
+    prev = False
     try:
         import ssl
         if hasattr(ssl, '_create_default_https_context'):
-            if cfg.enable_https_verification():
+            prev = ssl._create_default_https_context == ssl.create_default_context
+            if value:
                 ssl._create_default_https_context = ssl.create_default_context
             else:
                 ssl._create_default_https_context = ssl._create_unverified_context
     except ImportError:
         pass
+    return prev
+
+
+def guard_https_ver():
+    """ Callback for change of https verification """
+    set_https_verification(cfg.enable_https_verification())
 
 
 def add_url(url, pp=None, script=None, cat=None, priority=None, nzbname=None):