Debian installer MySQL connection string wrong, causing UTF-8 save problem

I've used the Debian xwiki-mysql installer to install XWiki 5.1.

When saving non-latin characters, in either wiki/wysiwyg editor, such as – Ĉ --, the character gets saved to mysql as a "?"(question mark).

After install, in file:

/etc/xwiki/hibernate.cfg.xml

The connection url has double escape of ampersands &amp

<property name="connection.url">jdbc:mysql://localhost/xwiki?useServerPrepStmts=false&amp;amp;useUnicode=true&amp;amp;characterEncoding=UTF-8</property>

Removing the double "amp;" fixes this issue.

<property name="connection.url">jdbc:mysql://localhost/xwiki?useServerPrepStmts=false&amp;useUnicode=true&amp;characterEncoding=UTF-8</property>