doc: Point out sscg in cockpit-tls(8)
doc: Point out sscg in cockpit-tls(8)

cockpit-project/cockpit,moraleslazaro/cockpit,deryni/cockpit,mvollmer/cockpit,garrett/cockpit,garrett/cockpit,mvollmer/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,deryni/cockpit,martinpitt/cockpit,deryni/cockpit,martinpitt/cockpit,cockpit-project/cockpit,garrett/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,mvollmer/cockpit,deryni/cockpit,martinpitt/cockpit,garrett/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,garrett/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,deryni/cockpit,deryni/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,deryni/cockpit,martinpitt/cockpit