filter expert: treat filter_regex false as False

if the parameter
filter_regex: false
was set, the bot treated this as true
with this patch, false is treated as false

intelmq/bots/experts/filter/expert.py

@@ -64,7 +64,7 @@ def init(self):
             self.filter = False
 
         self.regex = False
-        if self.filter_regex is not None:
+        if self.filter_regex is not None and self.filter_regex is not False:
             self.regex = re.compile(self.filter_value)
 
         self.time_filter = self.not_after is not None or self.not_before is not None