Use month of reddisc as beginning if missing

Construct a fictive but sensfull beginning if we cant detect one
Needed since beginning is mandatory

Related Task: [https://fs.golderweb.de/index.php?do=details&task_id=76 FS#76]

redfam.py

@@ -359,6 +359,19 @@ class RedFamParser( RedFam ):
         # Extract beginnig and maybe ending
         (beginning, ending) = RedFamParser.extract_dates( text, isarchive )
 
+        # Missing beginning (Task: FS#76)
+        # Use first day of month of reddisc
+        if not beginning:
+            match = re.search(
+                jogobot.config["redundances"]["reddiscs_onlyinclude_re"],
+                page.title() )
+
+            if match:
+                beginning = datetime.strptime(
+                    "01. {month} {year}".format(
+                        month=match.group(1), year=match.group(2)),
+                    "%d. %B %Y" )
+
         # Create the RedFam object
         RedFamParser( heading, page, isarchive, beginning, ending )