Disable parser cache by default to avoid issues because we can't invalidate said cache

peppermint.guiconfig.json

@@ -21,7 +21,7 @@
 	"anonedits": { "type": "checkbox", "description": "Whether users who aren't logged in are allowed to edit your wiki.", "default": false },
 	"maxpagesize": { "type": "number", "description": "The maximum page size in characters.", "default": 135000 },
 	"parser": { "type": "text", "description": "The parser to use when rendering pages. Defaults to an extended version of parsedown (http://parsedown.org/)", "default": "parsedown" },
-	"parser_cache": { "type": "checkbox", "description": "Whether parser output should be cached to speed things up. The cache directory is <code>._cache</code> in the data directory - delete it if you experience issues (unlikely).", "default": true },
+	"parser_cache": { "type": "checkbox", "description": "Whether parser output should be cached to speed things up. The cache directory is <code>._cache</code> in the data directory - delete it if you experience issues (unlikely).", "default": false },
 	"parser_cache_min_size": { "type": "number", "description": "The minimum size a source string must be (in bytes) before it's considered eligible for caching.", "default": 1024 },
 	"parser_ext_renderers_enabled": { "type": "checkbox", "description": "Whether to enable external diagram renderer support, which is part of the parsedown parser. See the <code>parser_ext_renderers</code> setting below for more information.", "default": true },
 	"parser_ext_renderers": { "type": "parserext", "description": "Used by the parsedown parser as an object mapping fenced code block languages to their respective external renderers. Should be in the form <code>language_code</code> → <code>external renderer definition</code>. See the default for examples on how to define an external renderer. Warning: On Windows, the enforcement of strict time limits is not possible. Beware of DoS attacks!", "default": {