Add MSG_SLAVE_STATUS_V2 to slave interface
Summary:
This patch defines a new version of slave status message MSG_SLAVE_STATUS_V2, which the slave sends along with all of its
status information which includes slave's hold status and url.
Reviewers: dfaure
Reviewed By: dfaure
Subscribers: Frameworks
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D11010