Reverted coverage badge back to master branch.
Reverted coverage badge back to master branch.


Former-commit-id: 2ecf33c0297ff63af312ee0ce9bc34b05592b009
Former-commit-id: dec40236f652a360bbe42a664a9a4608c079c1ac
Former-commit-id: f5c55cee88b739e38d5fe94ef99ce461f09c0f7d
r-net-tools/net-security