res_pjsip: AMI commands and events.

Created the following AMI commands and corresponding events for res_pjsip:

PJSIPShowEndpoints - Provides a listing of all pjsip endpoints and a few
                     select attributes on each.
  Events:
    EndpointList - for each endpoint a few attributes.
    EndpointlistComplete - after all endpoints have been listed.

PJSIPShowEndpoint - Provides a detail list of attributes for a specified
                    endpoint.
  Events:
    EndpointDetail - attributes on an endpoint.
    AorDetail - raised for each AOR on an endpoint.
    AuthDetail - raised for each associated inbound and outbound auth
    TransportDetail - transport attributes.
    IdentifyDetail - attributes for the identify object associated with
                     the endpoint.
    EndpointDetailComplete - last event raised after all detail events.

PJSIPShowRegistrationsInbound - Provides a detail listing of all inbound
                                registrations.
  Events:
    InboundRegistrationDetail - inbound registration attributes for each
                                registration.
    InboundRegistrationDetailComplete - raised after all detail records have
                                been listed.

PJSIPShowRegistrationsOutbound  - Provides a detail listing of all outbound
                                  registrations.
  Events:
    OutboundRegistrationDetail - outbound registration attributes for each
                                 registration.
    OutboundRegistrationDetailComplete - raised after all detail records
                                 have been listed.

PJSIPShowSubscriptionsInbound - A detail listing of all inbound subscriptions
                                and their attributes.
  Events:
    SubscriptionDetail - on each subscription detailed attributes
    SubscriptionDetailComplete - raised after all detail records have
                                 been listed.

PJSIPShowSubscriptionsOutbound - A detail listing of all outboundbound
                                subscriptions and their attributes.
  Events:
    SubscriptionDetail - on each subscription detailed attributes
    SubscriptionDetailComplete - raised after all detail records have
                                 been listed.

(issue ASTERISK-22609)
Reported by: Matt Jordan
Review: https://reviewboard.asterisk.org/r/2959/
........

Merged revisions 403131 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@403133 f38db490-d61c-443f-a65b-d21fe96a405b
ARI: Implement device state API

Created a data model and implemented functionality for an ARI device state
resource.  The following operations have been added that allow a user to
manipulate an ARI controlled device:

Create/Change the state of an ARI controlled device
PUT    /deviceStates/{deviceName}&{deviceState}

Retrieve all ARI controlled devices
GET    /deviceStates

Retrieve the current state of a device
GET    /deviceStates/{deviceName}

Destroy a device-state controlled by ARI
DELETE /deviceStates/{deviceName}

The ARI controlled device must begin with 'Stasis:'.  An example controlled
device name would be Stasis:Example.  A 'DeviceStateChanged' event has also
been added so that an application can subscribe and receive device change
events.  Any device state, ARI controlled or not, can be subscribed to.

While adding the event, the underlying subscription control mechanism was
refactored so that all current and future resource subscriptions would be
the same.  Each event resource must now register itself in order to be able
to properly handle [un]subscribes.

(issue ASTERISK-22838)
Reported by: Matt Jordan
Review: https://reviewboard.asterisk.org/r/3025/
........

Merged revisions 403134 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@403135 f38db490-d61c-443f-a65b-d21fe96a405b