The • character is breaking mailto links when migrated

Issue Summary

When the • character is present in a mailto link, this completely breaks the link on the cloud, and the link is lost forever.

Steps to Reproduce

1. Create a Confluence Page on Server/DC.
2. Insert a link in this page like

   mailto:charlie@localhost.com?cc=confcloud@mycooldomain.com&subject=Email subject&body=Hi this characters break things • 

3. Migrate this space to the cloud

Expected Results

The link should work on the Cloud as it works on the Server

Actual Results

The mailto link is lost forever, and we only have a non-working link tag.

Before the migration (page on Server):

<p> 
Drop me <a href="mailto:charlie@localhost.com?cc=confcloud@mycooldomain.com&subject=Email subject&body=Hi this characters break things •">message</a> 
</p> 

After the migration (page on Cloud):

<p> 
Drop me <a>message</a> 
</p> 

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available