Fix links in Javadoc and reference docs

- Fix broken links (by using a new URL, an alternative URL, or a
  Wayback Machine link)

- Use HTTPS where possible

- Remove https://issuetracker.springsource.com/browse/EBR-349: this
  link is dead and is also mentioned in
  https://jira.spring.io/browse/SPR-8093

- Clean up nohttp allowlist.lines

Closes gh-28876

spring-core/src/main/java/org/springframework/core/BridgeMethodResolver.java

@@ -226,7 +226,7 @@ public final class BridgeMethodResolver {
 	/**
 	 * Compare the signatures of the bridge method and the method which it bridges. If
 	 * the parameter and return types are the same, it is a 'visibility' bridge method
-	 * introduced in Java 6 to fix https://bugs.java.com/view_bug.do?bug_id=6342411.
+	 * introduced in Java 6 to fix https://bugs.openjdk.org/browse/JDK-6342411.
 	 * See also https://stas-blogspot.blogspot.com/2010/03/java-bridge-methods-explained.html
 	 * @return whether signatures match as described
 	 */