Reenable the test on non-Windows.

netwerk/test/unit/test_plaintext_sniff.js

@@ -169,8 +169,12 @@ function makeHandler(headerIdx, bodyIdx) {
 
 var httpserv;
 function run_test() {
-  // disable again for now
+  // disable on Windows for now, because it seems to leak sockets and die.
+  // Silly operating system!
+  // This is a really nasty way to detect Windows.  I wish we could do better.
+  if ("@mozilla.org/windows-registry-key;1" in Cc) {
     return;
+  }
   
   httpserv = new nsHttpServer();