Merge pull request #42 from poeschik/master

Log exception instead of writing to stderr

src/main/java/com/github/markusbernhardt/proxy/search/wpad/WpadProxySearchStrategy.java

@@ -197,7 +197,7 @@ private String detectScriptUrlPerDHCP() throws IOException {
         }
       }
     } catch (SocketException e) {
-      e.printStackTrace();
+      Logger.log(getClass(), LogLevel.ERROR, "Error detecting script url via DHCP.", e);
     }
     return url;
   }