modify description style for Passport authentication mechanism

lib/views/admin/security.html

@@ -126,7 +126,7 @@
               </h4>
               <ul>
                 <li>Username, E-mail and Password authentication</li>
-                <li class="text-muted">(TBD) <del>LDAP authentication</del></li>
+                <li>LDAP authentication</li>
                 <li class="text-muted">(TBD) <del>Google OAuth2 authentication</del></li>
                 <li class="text-muted">(TBD) <del>Facebook OAuth2 authentication</del></li>
                 <li class="text-muted">(TBD) <del>Twitter OAuth authentication</del></li>