GlideUrl fix for urls with IPV6 addresses

IPV6 URLs are of the form http://[2607:f8b0:4006:823::200e]/ but the
code was removing the square brackets from the URL, resulting in an
invalid URL and a MalformedURLException.

library/src/main/java/com/bumptech/glide/load/model/GlideUrl.java

@@ -26,7 +26,7 @@
  * convenience.
  */
 public class GlideUrl implements Key {
-  private static final String ALLOWED_URI_CHARS = "@#&=*+-_.,:!?()/~'%;$";
+  private static final String ALLOWED_URI_CHARS = "@#&=*+-_.,:!?()/~'%;$[]";
   private final Headers headers;
   @Nullable private final URL url;
   @Nullable private final String stringUrl;