[Minor] Add new config options to classifiers

src/libserver/cfg_file.h

@@ -174,6 +174,8 @@ struct rspamd_classifier_config {
 	gchar *name;                                    /**< unique name of classifier							*/
 	guint32 min_tokens;                             /**< minimal number of tokens to process classifier 	*/
 	guint32 max_tokens;                             /**< maximum number of tokens							*/
+	guint min_token_hits;                           /**< minimum number of hits for a token to be considered */
+	gdouble min_prob_strength;                      /**< use only tokens with probability in [0.5 - MPS, 0.5 + MPS] */
 	guint min_learns;                               /**< minimum number of learns for each statfile			*/
 	guint flags;
 };

src/libserver/cfg_rcl.c

@@ -2147,6 +2147,18 @@ rspamd_rcl_config_init (struct rspamd_config *cfg, GHashTable *skip_sections)
 				G_STRUCT_OFFSET (struct rspamd_classifier_config, min_tokens),
 				RSPAMD_CL_FLAG_INT_32,
 				"Minimum count of tokens (words) to be considered for statistics");
+		rspamd_rcl_add_default_handler (sub,
+				"min_token_hits",
+				rspamd_rcl_parse_struct_integer,
+				G_STRUCT_OFFSET (struct rspamd_classifier_config, min_token_hits),
+				RSPAMD_CL_FLAG_UINT,
+				"Minimum number of hits for a token to be considered");
+		rspamd_rcl_add_default_handler (sub,
+				"min_prob_strength",
+				rspamd_rcl_parse_struct_double,
+				G_STRUCT_OFFSET (struct rspamd_classifier_config, min_token_hits),
+				0,
+				"Use only tokens with probability in [0.5 - MPS, 0.5 + MPS]");
 		rspamd_rcl_add_default_handler (sub,
 				"max_tokens",
 				rspamd_rcl_parse_struct_integer,

src/libserver/cfg_utils.c

@@ -971,7 +971,10 @@ rspamd_config_new_classifier (struct rspamd_config *cfg,
 		c =
 			rspamd_mempool_alloc0 (cfg->cfg_pool,
 				sizeof (struct rspamd_classifier_config));
+		c->min_prob_strength = 0.343;
+		c->min_token_hits = 2;
 	}
+
 	if (c->labels == NULL) {
 		c->labels = g_hash_table_new_full (rspamd_str_hash,
 				rspamd_str_equal,