This is a minor update to make sure that update to version 8 will
not break existing users. Source tarball will not be published at ftp.

It now included in extensions-web: https://git.gnome.org/browse/extensions-web/commit/?id=b576313701842acf00465e92d181b05d36a0832c

Fixes: https://github.com/nE0sIghT/chrome-gnome-shell-mirror/issues/14

That way we can drop all "primary-instance" logic that was broken
by design.
Also strange "primary-instance" crash is not issue now.

So user will receive update notification.

For some reason wrong version number is returned for some extensions
and it is breaking sweettooth server.

Thanks to yut23 from Github for finding this.

https://github.com/nE0sIghT/chrome-gnome-shell-mirror/issues/8

By default Debian/Ubuntu do not removes conffiles under /etc along with
package. Because of this it's not possible to uninstall web extension
from browser.
This change force removal of policy files.

https://github.com/nE0sIghT/chrome-gnome-shell-mirror/issues/12
https://github.com/nE0sIghT/chrome-gnome-shell-mirror/issues/13

Abstract local sockets are supported only in Linux.