Fixes thaliproject#114: Don't Delete CookieAuth file

Author: sisbell

universal/src/main/java/com/msopentech/thali/toronionproxy/OnionProxyManager.java

@@ -359,7 +359,6 @@ public synchronized void start() throws IOException {
             if (!controlPortFile.getParentFile().exists()) controlPortFile.getParentFile().mkdirs();
 
             File cookieAuthFile = getContext().getConfig().getCookieAuthFile();
-            cookieAuthFile.delete();
             if (!cookieAuthFile.getParentFile().exists()) cookieAuthFile.getParentFile().mkdirs();
 
             torProcess = spawnTorProcess();
@@ -484,6 +483,10 @@ private void waitForControlPortFileCreation(File controlPortFile) throws IOExcep
      * if the timeout for the cookie auth file to be created is exceeded, then  an IOException is thrown.
      */
     private void waitForCookieAuthFileCreation(File cookieAuthFile) throws IOException {
+        if(cookieAuthFile.exists() && cookieAuthFile.length() != 0 ) {
+            LOG.info("Cookie auth file already exists");
+            return;
+        }
         long cookieAuthStartTime = System.currentTimeMillis();
         LOG.info("Waiting for cookie auth file");
         boolean isCreated = cookieAuthFile.exists() || cookieAuthFile.createNewFile();