Fail build on missing configuration property descriptions

Closes gh-31916

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java

@@ -1738,8 +1738,14 @@ public class ServerProperties {
 
 		public static class Options {
 
+			/**
+			 * Socket options as defined in org.xnio.Options.
+			 */
 			private Map<String, String> socket = new LinkedHashMap<>();
 
+			/**
+			 * Server options as defined in io.undertow.UndertowOptions.
+			 */
 			private Map<String, String> server = new LinkedHashMap<>();
 
 			public Map<String, String> getServer() {

spring-boot-project/spring-boot-autoconfigure/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -129,17 +129,67 @@
       "name": "server.port",
       "defaultValue": 8080
     },
+    {
+      "name": "server.reactive.session.cookie.domain",
+      "description": "Domain for the cookie."
+    },
+    {
+      "name": "server.reactive.session.cookie.http-only",
+      "description": "Whether to use \"HttpOnly\" cookies for the cookie."
+    },
+    {
+      "name": "server.reactive.session.cookie.max-age",
+      "description": "Maximum age of the cookie. If a duration suffix is not specified, seconds will be used. A positive value indicates when the cookie expires relative to the current time. A value of 0 means the cookie should expire immediately. A negative value means no \"Max-Age\"."
+    },
+    {
+      "name": "server.reactive.session.cookie.name",
+      "description": "Name for the cookie."
+    },
+    {
+      "name": "server.reactive.session.cookie.path",
+      "description": "Path of the cookie."
+    },
+    {
+      "name": "server.reactive.session.cookie.same-site",
+      "description": "SameSite setting for the cookie."
+    },
+    {
+      "name": "server.reactive.session.cookie.secure",
+      "description": "Whether to always mark the cookie as secure."
+    },
+    {
+      "name": "server.servlet.encoding.charset",
+      "description": "Charset of HTTP requests and responses. Added to the \"Content-Type\" header if not set explicitly.",
+      "defaultValue": "UTF-8"
+    },
     {
       "name": "server.servlet.encoding.enabled",
       "type": "java.lang.Boolean",
       "description": "Whether to enable http encoding support.",
       "defaultValue": true
     },
+    {
+      "name": "server.servlet.encoding.force",
+      "description": "Whether to force the encoding to the configured charset on HTTP requests and responses."
+    },
+    {
+      "name": "server.servlet.encoding.force-request",
+      "description": "Whether to force the encoding to the configured charset on HTTP requests. Defaults to true when \"force\" has not been specified."
+    },
+    {
+      "name": "server.servlet.encoding.force-response",
+      "description": "Whether to force the encoding to the configured charset on HTTP responses."
+    },
+    {
+      "name": "server.servlet.encoding.mapping",
+      "description": "Mapping of locale to charset for response encoding."
+    },
     {
       "name": "server.servlet.jsp.class-name",
       "description": "Class name of the servlet to use for JSPs. If registered is true and this class\n\t * is on the classpath then it will be registered.",
       "defaultValue": "org.apache.jasper.servlet.JspServlet"
     },
+
     {
       "name": "server.servlet.jsp.init-parameters",
       "description": "Init parameters used to configure the JSP servlet."
@@ -159,6 +209,38 @@
         "level": "error"
       }
     },
+    {
+      "name": "server.servlet.session.cookie.comment",
+      "description": "Comment for the cookie."
+    },
+    {
+      "name": "server.servlet.session.cookie.domain",
+      "description": "Domain for the cookie."
+    },
+    {
+      "name": "server.servlet.session.cookie.http-only",
+      "description": "Whether to use \"HttpOnly\" cookies for the cookie."
+    },
+    {
+      "name": "server.servlet.session.cookie.max-age",
+      "description": "Maximum age of the cookie. If a duration suffix is not specified, seconds will be used. A positive value indicates when the cookie expires relative to the current time. A value of 0 means the cookie should expire immediately. A negative value means no \"Max-Age\"."
+    },
+    {
+      "name": "server.servlet.session.cookie.name",
+      "description": "Name of the cookie."
+    },
+    {
+      "name": "server.servlet.session.cookie.path",
+      "description": "Path of the cookie."
+    },
+    {
+      "name": "server.servlet.session.cookie.same-site",
+      "description": "SameSite setting for the cookie."
+    },
+    {
+      "name": "server.servlet.session.cookie.secure",
+      "description": "Whether to always mark the cookie as secure."
+    },
     {
       "name": "server.servlet.session.persistent",
       "description": "Whether to persist session data between restarts.",
@@ -1928,6 +2010,68 @@
         "level": "error"
       }
     },
+    {
+      "name": "spring.rsocket.server.ssl.ciphers",
+      "description": "Supported SSL ciphers."
+    },
+    {
+      "name": "spring.rsocket.server.ssl.client-auth",
+      "description": "Client authentication mode. Requires a trust store."
+    },
+    {
+      "name": "spring.rsocket.server.ssl.enabled",
+      "description": "Whether to enable SSL support.",
+      "defaultValue": true
+    },
+    {
+      "name": "spring.rsocket.server.ssl.enabled-protocols",
+      "description": "Enabled SSL protocols."
+    },
+    {
+      "name": "spring.rsocket.server.ssl.key-alias",
+      "description": "Alias that identifies the key in the key store."
+    },
+    {
+      "name": "spring.rsocket.server.ssl.key-password",
+      "description": "Password used to access the key in the key store."
+    },
+    {
+      "name": "spring.rsocket.server.ssl.key-store",
+      "description": "Path to the key store that holds the SSL certificate (typically a jks file)."
+    },
+    {
+      "name": "spring.rsocket.server.ssl.key-store-password",
+      "description": "Password used to access the key store."
+    },
+    {
+      "name": "spring.rsocket.server.ssl.key-store-provider",
+      "description": "Provider for the key store."
+    },
+    {
+      "name": "spring.rsocket.server.ssl.key-store-type",
+      "description": "Type of the key store."
+    },
+    {
+      "name": "spring.rsocket.server.ssl.protocol",
+      "description": "SSL protocol to use.",
+      "defaultValue": "TLS"
+    },
+    {
+      "name": "spring.rsocket.server.ssl.trust-store",
+      "description": "Trust store that holds SSL certificates."
+    },
+    {
+      "name": "spring.rsocket.server.ssl.trust-store-password",
+      "description": "Password used to access the trust store."
+    },
+    {
+      "name": "spring.rsocket.server.ssl.trust-store-provider",
+      "description": "Provider for the trust store."
+    },
+    {
+      "name": "spring.rsocket.server.ssl.trust-store-type",
+      "description": "Type of the trust store."
+    },
     {
       "name": "spring.rsocket.server.transport",
       "defaultValue": "tcp"
@@ -2035,10 +2179,6 @@
       "description": "Whether to enable Spring's HiddenHttpMethodFilter.",
       "defaultValue": false
     },
-    {
-      "name": "spring.webflux.session.timeout",
-      "defaultValue": "30m"
-    },
     {
       "name": "spring.webservices.wsdl-locations",
       "type": "java.util.List<java.lang.String>",