Fixed case-sensitivity bug in repository name enumeration

src/main/java/com/gitblit/GitBlit.java

 		}
 		
 		// return sorted copy of cached list
-		List<String> list = new ArrayList<String>(repositoryListCache.keySet());		
+		List<String> list = new ArrayList<String>();
+		for (RepositoryModel model : repositoryListCache.values()) {
+			list.add(model.name);
+		}
 		StringUtils.sortRepositorynames(list);
 		return list;
 	}