finishing touches for PR# 2328

Antispam.rst contained a syntax error.
Move config description to common section which is more fitting.
Fixed wrong assignment of default value for DEFAULT_SPAM_THRESHOLD in models.py.

core/admin/mailu/models.py

@@ -509,7 +509,12 @@ class User(Base, Email):
     displayed_name = db.Column(db.String(160), nullable=False, default='')
     spam_enabled = db.Column(db.Boolean, nullable=False, default=True)
     spam_mark_as_read = db.Column(db.Boolean, nullable=False, default=True)
-    spam_threshold = db.Column(db.Integer, nullable=False, default=app.config['DEFAULT_SPAM_THRESHOLD'])
+    def default_spam_threshold(cls):
+        if app:
+            return app.config['DEFAULT_SPAM_THRESHOLD']
+        else:
+            return 80
+    spam_threshold = db.Column(db.Integer, nullable=False, default=default_spam_threshold)
 
     # Flask-login attributes
     is_authenticated = True

docs/antispam.rst

@@ -43,7 +43,7 @@ Rspamd rejects non-compliant email messages and email messages that contain viru
 
    66% (10/15) is less than 80%, so the email is classified as ham. This email message will go to the inbox folder. If the user wants email messages with a score of 10 (66%) to be classified as spam, then the user defined spam filter tolerance can be lowered to 65% in the administration web interface.
 
-   The default spam filter tolerance used for new users can be configured using the environment variable ``DEFAULT_SPAM_THRESHOLD``. See also: :ref:`_advanced_cfg`.
+   The default spam filter tolerance used for new users can be configured using the environment variable ``DEFAULT_SPAM_THRESHOLD``. See also :ref:`common_cfg` in the configuration reference.
 
 .. image:: assets/screenshots/SpamFiltering.png
 

docs/configuration.rst

@@ -62,6 +62,8 @@ there is a good way to disable rate limiting altogether.
 The ``TLS_FLAVOR`` sets how Mailu handles TLS connections. Setting this value to
 ``notls`` will cause Mailu not to server any web content! More on :ref:`tls_flavor`.
 
+The ``DEFAULT_SPAM_THRESHOLD`` (default: 80) is the default spam tolerance used when creating a new user.
+
 Mail settings
 -------------
 
@@ -211,8 +213,6 @@ The ``TZ`` sets the timezone Mailu will use. The timezone naming convention usua
 
 .. _`TZ database name`: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
 
-The ``DEFAULT_SPAM_THRESHOLD`` (default: 80) setting is the default spam tolerance used when creating a new user.
-
 Antivirus settings
 ------------------