[Rspamd] Add mailcow fuzzy hash store

data/conf/rspamd/local.d/fuzzy_check.conf

@@ -27,4 +27,27 @@ rule "local" {
     }
 }
 
+rule "mailcow" {
+    # Fuzzy storage server list
+    servers = "95.217.129.125:11445";
+    # Default symbol for unknown flags
+    symbol = "MAILCOW_FUZZY_UNKNOWN";
+    # Additional mime types to store/check
+    mime_types = ["application/*"];
+    # Hash weight threshold for all maps
+    max_score = 100.0;
+    # Whether we can learn this storage
+    read_only = yes;
+    # Ignore unknown flags
+    skip_unknown = yes;
+    # Hash generation algorithm
+    algorithm = "mumhash";
 
+    # Map flags to symbols
+    fuzzy_map = {
+        MAILCOW_FUZZY_DENIED {
+            max_score = 10.0;
+            flag = 11;
+        }
+    }
+}

data/conf/rspamd/local.d/fuzzy_group.conf

@@ -1,10 +1,16 @@
 symbols = {
     "LOCAL_FUZZY_UNKNOWN" {
-        weight = 2.0;
+        weight = 0.1;
     }
     "LOCAL_FUZZY_DENIED" {
         weight = 15.0;
     }
+    "MAILCOW_FUZZY_UNKNOWN" {
+        weight = 0.1;
+    }
+    "MAILCOW_FUZZY_DENIED" {
+        weight = 7.0;
+    }
     "LOCAL_FUZZY_WHITE" {
         weight = -10.0;
     }