W init.d-script-provides-virtual-facility

This /etc/init.d script indicates in its LSB headers that it provides a virtual facility, denoted by the dollar sign in front of the name.

This is not the correct way to provide a virtual facility. Instead, the package should include a file in /etc/insserv.conf.d, usually named after the package, containing:

$virtual_facility_name +init-script-name

to declare that the named init script provides the named virtual facility.

Refer to https://wiki.debian.org/LSBInitScripts/DebianVirtualFacilities for details.