Backslash breaks Ldapsearch for user Emailaddress

[Karsten Bandlow]

Searchresults from ldap contains sometimes backslashes as an escape character. In the second query the backslash breaks the query, so in webui no mailaddress are found. So the queryresult from the first query need to clean with stripslashes.

[Janos SUTO]

Thanks for your contribution for fixing the problem. I've just committed the patch.