allow specials chars in repo names

see http://code.google.com/p/gitblit/issues/detail?id=362

src/main/java/com/gitblit/servlet/AuthenticationFilter.java

@@ -100,6 +100,12 @@ public abstract class AuthenticationFilter extends DaggerFilter {
 			url = url.substring(1);
 		}
 		String fullUrl = url + (StringUtils.isEmpty(params) ? "" : ("?" + params));
+		try {
+			fullUrl = URLDecoder.decode(fullUrl, "UTF-8");
+		} catch (UnsupportedEncodingException e) {
+			logger.warn("UTF-8 decoding of URL failed: "+fullUrl, e);
+			e.printStackTrace();
+		}
 		return fullUrl;
 	}
 
@@ -180,4 +186,4 @@ public abstract class AuthenticationFilter extends DaggerFilter {
 			return user;
 		}
 	}
-}
+}