Supplementary cache options patch.

Changelog excerpt:
- Added a default caching prefix.

Author: Maikuolan

Changelog.md

@@ -73,3 +73,5 @@ __*Why "v3.0.0" instead of "v1.0.0?"*__ Prior to phpMussel v3, the "phpMussel Co
 ### v3.3.2
 
 [2022.02.21; Maikuolan]: Improved IP address resolution strategy.
+
+[2022.02.21; Maikuolan]: Added a default caching prefix.

assets/config.yml

@@ -7,7 +7,7 @@
 # License: GNU/GPLv2
 # @see LICENSE.txt
 #
-# This file: Configuration defaults file (last modified: 2022.02.20).
+# This file: Configuration defaults file (last modified: 2022.02.21).
 ##/
 
 core:
@@ -389,7 +389,7 @@ legal:
 supplementary_cache_options:
  prefix:
   type: "string"
-  default: ""
+  default: "phpMussel_"
  enable_apcu:
   type: "bool"
   default: true