Re: (ITS#5348) slapcat on 2.3.38 to slapadd on 2.4.7 causes abort.

[hachi]

Tested against both HEAD and OPENLDAP_REL_ENG_2_4, same error:

slapadd: schema_init.c:3669: csnNormalize: Assertion `val->bv_len == 
(sizeof("YYYYmmddHHMMSS.uuuuuuZ#SSSSSS#SID#ssssss")-1)' failed.
Aborted