add getAllGroups() that uses a paged search if available
this circumvents server side search limits
(active directory has a limit of 1000 by default)
use getAllGroup() in the updateGroups background job
needed in active directory deployments with > 1000 groups
add ldap_paging_size config option
Merge branch 'ldap_paging_chunksize' into ldap_get_all_groups
merge functionality of getAllGroups into getGroups