[Rspamd] Remove per_user settings as they were pretty much useless, some minor changes to bayes"

data/conf/rspamd/local.d/statistic.conf

@@ -2,28 +2,12 @@ classifier "bayes" {
     tokenizer {
       name = "osb";
     }
-
+    autolearn = false;
     backend = "redis";
-    name = "per_domain_bayes";
     min_tokens = 11;
-    min_learns = 20;
+    min_learns = 5;
     new_schema = true;
-    expiry = 50d;
+    expire = 2592000;
-    per_user = <<EOD
-return function(task)
-    local rcpt = task:get_recipients(1)
-
-if rcpt then
-    one_rcpt = rcpt[1]
-    if one_rcpt['domain'] then
-        return one_rcpt['domain']
-    end
-end
-
-return nil
-end
-EOD
-
     statfile {
         symbol = "BAYES_HAM";
         spam = false;
@@ -32,28 +16,4 @@ EOD
         symbol = "BAYES_SPAM";
         spam = true;
     }
-    learn_condition =<<EOD
-return function(task, is_spam, is_unlearn)
-    local prob = task:get_mempool():get_variable('bayes_prob', 'double')
-
-    if prob then
-        local in_class = false
-        local cl
-        if is_spam then
-            cl = 'spam'
-            in_class = prob >= 0.95
-        else
-            cl = 'ham'
-            in_class = prob <= 0.05
-        end
-
-        if in_class then
-            return false,string.format('already in class %s; probability %.2f%%',
-            cl, math.abs((prob - 0.5) * 200.0))
-        end
-    end
-
-    return true
-end
-EOD
 }