email: added help block on where to change email settings

rhodecode/authentication/plugins/auth_ldap.py

@@ -55,6 +55,7 b' except ImportError:'
 class LdapError(Exception):
     pass
 
+
 def plugin_factory(plugin_id, *args, **kwds):
     """
     Factory function that is called during plugin discovery.

rhodecode/templates/admin/settings/settings_email.mako

@@ -26,6 +26,10 b''
           <dd  title="${h.tooltip(tt)}">${dd}</dd>
         %endfor
         </dl>
+        <span class="help-block">
+            ${_('You can adjust those settings in [DEFAULT] section of .ini file located at')}: <br/>
+            ${c.rhodecode_ini.get('__file__')}
+        </span>
     </div>
 </div>