typo, fixes #5517
LDAP: when multiline values are passed as array, do not try to preg_split them. Fixes #5521
LDAP Wizard: always show correct Back+Continue Buttons, fixes #5520
LDAP: don't validate unconfigured (new) LDAP server configs, fixes #5518
Merge pull request #5532 from owncloud/ldap_fixes

Ldap fixes