Attempting to create a rule that requires a permission to allow a call
to a destination that is not a gateway does not generate correct
configuration. Users sometimes request this in order to, for example,
require that even internal calls must be "from registered phones" (this
doesn't really require registration, but the effect is the same).

Configuration to generate the problem:

  Permissions
    Create a custom permission 'Station' - set to be enabled by default.

  Dial Plans
    Add a Custom Dial Rule, with settings:
        Enabled checked
        Name 'Extensions'
        Description 'Calls to internal extensions'
        Dialed Number
               Prefix ''
               and 3 digits
        Required Permissions
               Station checked
               (all others unchecked)
        Resulting Call
               Dial ''
               and append Entire dialed number
        Schedule Always
        No gateways

    Activate Dial Plans

The above should generate entries in mappingrules.xml (because there
is no gateway) and authrules.xml (because a permission is required).

The mappingrule entry that is generated now is:

  <mappings xmlns="http://www.sipfoundry.org/sipX/schema/xml/urlmap-00-00">
    ...
    <hostMatch>
      <hostPattern>${SIPXCHANGE_DOMAIN_NAME}</hostPattern>
      <hostPattern>${MY_FULL_HOSTNAME}</hostPattern>
      <hostPattern>${MY_HOSTNAME}</hostPattern>
      <hostPattern>${MY_IP_ADDR}</hostPattern>
      <userMatch>
        <!--Extensions-->
        <description>Calls to internal extensions</description>
        <userPattern>xxx</userPattern>
        <permissionMatch>
          <permission>perm_3</permission> <!-- INCORRECT -->
          <transform>
            <user>{digits}</user>
          </transform>
        </permissionMatch>
      </userMatch>
      ...

The line marked INCORRECT above should not be there at all.

The authrules entry generated by the above is:

  <mappings xmlns="http://www.sipfoundry.org/sipX/schema/xml/urlauth-00-00">
    <hostMatch>
      <!--to Pingtel-->
      <hostPattern>pingtel.com</hostPattern>
      <userMatch>
        <userPattern>xxx</userPattern>
        <permissionMatch/>
      </userMatch>
    </hostMatch>
    ...

which is incorrect because it does not require the configured
permission. The <permissionMatch/> element in the above should be:

  <permissionMatch>
    <permission>Status</permission>
  </permissionMatch>