fix: correct defaults in spring-configuration-metadata.json and align urlmapping cache size

Addresses review feedback from matrei on #15426, reflecting the state after PR #15574 removed redundant defaults from generated application.yml files.

- grails.urlmapping.cache.maxsize: change DEFAULT_MAX_WEIGHTED_CAPACITY in DefaultUrlMappingsHolder from 5000 to 1000 so the code default matches the documented value (the generated application.yml value removed in #15574).

- grails.views.default.codec: correct defaultValue from 'none' to 'html' and clarify it is the fallback for the grails.views.gsp.codecs.* properties.

- grails.views.gsp.htmlcodec: remove misleading 'xml' default and describe the actual behavior (when unset, the legacy HTML4-compatible encoder is used; setting it to 'xml' or 'xhtml' selects the XML-safe encoder).

- grails.mime.disable.accept.header.userAgents: correct defaultValue from [] to ['Gecko', 'WebKit', 'Presto', 'Trident'] to match the regex baked into HttpServletResponseExtension.

Assisted-by: sisyphus:claude-opus-4-7

Author: jamesfredley

grails-gsp/plugin/src/main/resources/META-INF/spring-configuration-metadata.json

@@ -21,8 +21,8 @@
         {
             "name": "grails.views.default.codec",
             "type": "java.lang.String",
-            "description": "The default encoding codec for GSP output. Set to `html` to reduce XSS risk. Options: `none`, `html`, `base64`.",
-            "defaultValue": "none"
+            "description": "Fallback default for `grails.views.gsp.codecs.expression`, `scriptlet`, `taglib` and `staticparts` when those are not set. Options: `none`, `html`, `base64`.",
+            "defaultValue": "html"
         },
         {
             "name": "grails.views.gsp.encoding",
@@ -33,8 +33,7 @@
         {
             "name": "grails.views.gsp.htmlcodec",
             "type": "java.lang.String",
-            "description": "The HTML codec for GSP output (xml or html).",
-            "defaultValue": "xml"
+            "description": "Selects the HTML escaping style for GSP output. When not set (or when the value does not start with `xml` or equal (ignoring case) `xhtml`), a legacy HTML4-compatible encoder is used. Set to `xml` or `xhtml` to use the XML-safe encoder."
         },
         {
             "name": "grails.views.gsp.codecs.expression",

grails-web-core/src/main/resources/META-INF/spring-configuration-metadata.json

@@ -199,8 +199,8 @@
         {
             "name": "grails.mime.disable.accept.header.userAgents",
             "type": "java.util.List<java.lang.String>",
-            "description": "List of user agent substrings (e.g., Gecko, WebKit) for which Accept header processing is disabled.",
-            "defaultValue": []
+            "description": "List of user agent substrings (matched case-insensitively) for which Accept header processing is disabled.",
+            "defaultValue": ["Gecko", "WebKit", "Presto", "Trident"]
         },
         {
             "name": "grails.mime.disable.accept.header.userAgentsXhr",

grails-web-url-mappings/src/main/groovy/org/grails/web/mapping/DefaultUrlMappingsHolder.java

@@ -71,7 +71,7 @@
 public class DefaultUrlMappingsHolder implements UrlMappings {
 
     private static final transient Log LOG = LogFactory.getLog(DefaultUrlMappingsHolder.class);
-    private static final int DEFAULT_MAX_WEIGHTED_CAPACITY = 5000;
+    private static final int DEFAULT_MAX_WEIGHTED_CAPACITY = 1000;
     public static final UrlMappingInfo[] EMPTY_RESULTS = new UrlMappingInfo[0];
 
     private int maxWeightedCacheCapacity = DEFAULT_MAX_WEIGHTED_CAPACITY;