Merge pull request #25 from rosebe/master

upgrade dropbox

data/dropbox

@@ -0,0 +1,18 @@
+# List of all domains being operated by Dorpbox Inc.
+
+# Source: https://www.dropbox.com/en/help/security/official-domains
+db.tt
+dropbox.com
+dropboxapi.com
+dropboxusercontent.com
+dropboxbusiness.com
+dropboxforums.com
+dropboxforum.com
+dropboxinsiders.com
+dropboxmail.com
+dropboxpartners.com
+dropboxstatic.com
+dropbox.zendesk.com
+getdropbox.com
+paper.dropbox.com
+dropbox-dns.com