update history key in Rspamd Redis configuration

target/scripts/startup/setup.d/security/rspamd.sh

@@ -126,6 +126,15 @@ function __rspamd__setup_redis() {
 servers = "127.0.0.1:6379";
 expand_keys = true;
 
+EOF
+
+    # We do not use `{{HOSTNAME}}` but only `{{COMPRES}}` to better support
+    # Kubernetes, see https://github.com/orgs/docker-mailserver/discussions/3922
+    cat >"${RSPAMD_LOCAL_D}/history_redis.conf" << "EOF" 
+# documentation: https://rspamd.com/doc/modules/history_redis.html
+
+key_prefix = "rs_history{{COMPRESS}}";
+  
 EOF
 
     # Here we adjust the Redis default configuration that we supply to Redis when starting it.