dded config metadata for authldap plugin

lib/plugins/authldap/conf/metadata.php

+<?php
+$meta['server']      = array('string');
+$meta['port']        = array('numeric');
+$meta['usertree']    = array('string');
+$meta['grouptree']   = array('string');
+$meta['userfilter']  = array('string');
+$meta['groupfilter'] = array('string');
+$meta['version']     = array('numeric');
+$meta['starttls']    = array('onoff');
+$meta['referrals']   = array('onoff');
+$meta['binddn']      = array('string');
+$meta['bindpw']      = array('password');
+//$meta['mapping']['name']  unsupported in config manager
+//$meta['mapping']['grps']  unsupported in config manager
+$meta['userscope']   = array('multichoice','_choices' => array('sub','one','base'));
+$meta['groupscope']  = array('multichoice','_choices' => array('sub','one','base'));
+$meta['debug']       = array('onoff');
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lib/plugins/authldap/lang/en/settings.php

+<?php
+$lang['server']      = 'Your LDAP server. Either hostname (<code>localhost</code>) or full qualified URL (<code>ldap://server.tld:389</code>)';
+$lang['port']        = 'LDAP server port if no full URL was given above';
+$lang['usertree']    = 'Where to finde the user accounts. Eg. <code>ou=People, dc=server, dc=tld</code>';
+$lang['grouptree']   = 'Where to find the user groups. Eg. <code>ou=Group, dc=server, dc=tld</code>';
+$lang['userfilter']  = 'LDAP filter to search for user accounts. Eg. <code>(&(uid=%{user})(objectClass=posixAccount))</code>';
+$lang['groupfilter'] = 'LDAP filter to search for groups. Eg. <code>(&(objectClass=posixGroup)(|(gidNumber=%{gid})(memberUID=%{user})))</code>';
+$lang['version']     = 'The protocol version to use. You may need to set this to <code>3</code>';
+$lang['starttls']    = 'Use TLS connections?';
+$lang['referrals']   = 'Shall referrals be followed?';
+$lang['binddn']      = 'DN of an ptional bind user if anonymous bind is not sufficient. Eg. <code>cn=admin, dc=my, dc=home</code>';
+$lang['bindpw']      = 'Password of above user';
+$lang['userscope']   = 'Limit search scope for user search';
+$lang['groupscope']  = 'Limit search scope for group search';
+$lang['debug']       = 'Display additional debug information on errors';
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