Add @Override annotations, remove unused imports,

add some copyright headers, some tab->ws


git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@21654 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/ProxyConfiguration.java

@@ -112,6 +112,7 @@ public final class ProxyConfiguration implements Saveable {
         if(p.getUserName()!=null) {
         	// Add an authenticator which provides the credentials for proxy authentication
             Authenticator.setDefault(new Authenticator() {
+                @Override
                 public PasswordAuthentication getPasswordAuthentication() {
                     ProxyConfiguration p = Hudson.getInstance().proxy;
                     return new PasswordAuthentication(p.getUserName(),