mod_authnz_ldap: If AuthLDAPCharsetConfig is set, also convert the password to UTF-8.

PR: 45318
Backports: r902654
Submitted by: Johannes Mueller <joh_m gmx.de>, sf
Reviewed by: rpluem, wrowe


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1005561 13f79535-47bb-0310-9956-ffa450edef68