Update PRIVACY_POLICY.md (#10287)

build/PRIVACY_POLICY.md

@@ -40,6 +40,10 @@ Mattermost takes care to protect the information you provide as part of your use
 
 Internally, we restrict access to all personally identifiable information we receive from You to our personnel that need access to the information in order to do their jobs and that are authorized to handle such information. Our staff is limited and all personnel are committed to adhere to our privacy and security policies. All personnel execute nondisclosure agreements, which provide explicit confidentiality protections. Any staff member who violates our privacy and/or security policies is subject to possible termination of contract and civil/criminal prosecution.
 
+Privacy Shield
+
+Mattermost self-certifies that it adheres to the E.U.-U.S. Privacy Shield principles of notice, choice, onward transfer, security, data integrity, access and enforcement for personal data submitted by our customers and partners.  To see more information about our responsibilities under Privacy Shield, please see [https://mattermost.com/privacy-shield/](https://mattermost.com/privacy-shield/).
+
 Do we disclose any information to outside parties? 
 
 We do not sell, trade, or otherwise transfer the information we collect from you to unaffiliated third parties. We do, however, share the information we collect from you with trusted third parties who assist us in operating our site, conducting our business, or servicing you, provided that those parties agree to keep your information confidential and secure. This includes sharing the following anonymous usage statistics on the Gfycat feature with [Gfycat](https://gfycat.com/): which gifs are viewed and shared (without identifying specific users), how many users have used the feature, and the search terms and categories that are selected from the Gfycat picker. We also reserve the right to release your information when we believe that release is necessary to comply with the law, enforce our site policies, or protect our own or another’s intellectual property rights, property, or safety.
@@ -48,4 +52,4 @@ Changes to our privacy policy
 
 If we decide to change this Privacy Policy, we will include those changes with updated versions of the software.
 
-Last revised July 2018.
+Last revised January 2019.