(ITS#8677) back-sock segfaults on CONTINUE (database sock)

[michael@stroeder.com]

Full_Name: 
Version: 2.4.45
OS: Linux
URL: 
Submission from: (NULL) (213.240.182.98)


When using back-sock (database sock) and the external sock listener returns
CONTINUE then slapd seg faults.

Yes, returning CONTINUE is only allowed when using back-sock as overlay.
But slapd should not seg fault and rather return as LDAP result:

result: 80 Other (e.g., implementation specific) error
text: CONTINUE not allowed for back-sock