smb_rq_getenv
error = smb_rq_getenv(co, &rqp->sr_vc, &rqp->sr_share);
error = smb_rq_getenv(source, &t2p->t2_vc, NULL);
error = smb_rq_getenv(source, &ntp->nt_vc, NULL);
int smb_rq_getenv(struct smb_connobj *layer,