sn_hashfind
sn_hashfind(smbmntinfo_t *, const char *, int, avl_index_t *);
np = sn_hashfind(mi, rpath, rplen, NULL);
np = sn_hashfind(mi, rpath, rplen, NULL);
tnp = sn_hashfind(mi, rpath, rplen, &where);