centralize updating the vcl->state in vcl_set_state
centralize updating the vcl->state in vcl_set_state

Allow calling it for this purpose only (stop asserting if the
temperature has not changed)

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