session_select
session_select(dst_s, wl->idx);
session_select(dst_s, dst_idx);
session_select(s, RB_MIN(winlinks, &s->windows)->idx);
} else if (session_select(s, wl->idx) == 0) {
session_select(dst, wl_dst->idx);
session_select(src, wl_src->idx);
session_select(dst, dstwl->idx);
session_select(s, sc->wl->idx);
int session_select(struct session *, int);