Use a switch-case for the fini sequence
Use a switch-case for the fini sequence

This allows to test vgc_inistep only once and make it easier to work for
the compiler.

feld/Varnish-Cache,gquintard/Varnish-Cache,feld/Varnish-Cache,gquintard/Varnish-Cache,gquintard/Varnish-Cache,feld/Varnish-Cache,feld/Varnish-Cache,gquintard/Varnish-Cache,feld/Varnish-Cache