[FIXED HUDSON-5271] in 1.342. Automatic tool installation wasn't honoring proxy setting.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@25811 71c3de6d-444a-0410-be80-ed276b4c234a

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

@@ -105,6 +105,9 @@ public final class ProxyConfiguration implements Saveable {
             return null;
     }
 
+    /**
+     * This method should be used wherever {@link URL#openConnection()} to internet URLs is invoked directly.
+     */
     public static URLConnection open(URL url) throws IOException {
         ProxyConfiguration p = Hudson.getInstance().proxy;
         if(p==null)