Ldap filter parsing issue

Description

There is an error when using the webservice along with a valid ldap filter and attributes.

Distribution Name and Version

Debian 9.5

FusionDirectory Version

1.2-2~jenkinsbuild826

PHP version used

PHP7

Origin of php packages

FD

Steps to Reproduce

Webservice call:

CALL: LS [xxx, user, [fdContractStartDate:1, co:1], ou=people,dc=xxx,dc=yyy, (&(fdContractStartDate>=20180820000000Z)(fdContractStartDate<=20180919000000Z))]

ERROR: Could not find ACL for attribute "fdContractStartDate>"

Expected behavior:

no error, result returned