Duplicate attachment link

Actual Results:

When uploading certain attachments, the Wiki editor will show them as duplicate.

Steps to Reproduce:

1. Create an issue;
2. Attach a .zip or a .jar file.

Expected Results:

JIRA should not show the files duplicated.

Notes:

It seems that JIRA is only doing it with "compressed" files. Such as .zip or a .jar files.