Port configuration adjustment.

Changelog excerpt:
- Adjusted minimum value for some port directives from 1 to 0.

Author: Maikuolan

Changelog.md

@@ -95,3 +95,7 @@ __*Why "v3.0.0" instead of "v1.0.0?"*__ Prior to phpMussel v3, the "phpMussel Co
 [2022.10.28; Maikuolan]: Reworked how the configuration page deals with volume-based configuration.
 
 [2022.11.20; Maikuolan]: Avoid packaging unnecessary files into dist.
+
+### v3.3.4
+
+[2022.11.30; Maikuolan]: Adjusted minimum value for some port directives from 1 to 0.

assets/config.yml

@@ -7,7 +7,7 @@
 # License: GNU/GPLv2
 # @see LICENSE.txt
 #
-# This file: Configuration defaults file (last modified: 2022.10.28).
+# This file: Configuration defaults file (last modified: 2022.11.30).
 ##/
 
 core:
@@ -413,15 +413,15 @@ supplementary_cache_options:
  memcached_port:
   type: "int"
   default: 11211
-  min: 1
+  min: 0
   max: 65535
  redis_host:
   type: "string"
   default: "localhost"
  redis_port:
   type: "int"
   default: 6379
-  min: 1
+  min: 0
   max: 65535
  redis_timeout:
   type: "float"