(ITS#8292) Broken option parsing in tests:ldif-filter

[h . b . furuseth]

Full_Name: Hallvard B Furuseth
Version: 2.4.42
OS: 
URL: 
Submission from: (NULL) (81.191.45.5)
Submitted by: hallvard


'tests/progs/ldif-filter -s SPEC' fails if SPEC has no 'BACKEND='.
Fixing.