[Minor] Allow to get mempool from a session

src/libserver/milter.c

@@ -1489,4 +1489,12 @@ rspamd_milter_init_library (const gchar *spam_header)
 
 	milter_ctx = g_malloc (sizeof (*milter_ctx));
 	milter_ctx->spam_header = g_strdup (spam_header);
+}
+
+rspamd_mempool_t *
+rspamd_milter_get_session_pool (struct rspamd_milter_session *session)
+{
+	struct rspamd_milter_private *priv = session->priv;
+
+	return priv->pool;
 }

src/libserver/milter.h

@@ -149,4 +149,12 @@ void rspamd_milter_send_task_results (struct rspamd_milter_session *session,
  */
 void rspamd_milter_init_library (const gchar *spam_header);
 
+/**
+ * Returns pool for a session
+ * @param session
+ * @return
+ */
+rspamd_mempool_t *rspamd_milter_get_session_pool (
+		struct rspamd_milter_session *session);
+
 #endif