webconference : conference with dial-in and dial-out over DI (xmlrpc)

This conference module can do dial-in, dial-out and mixed 
dial-in/dial-out conferences.  It can be controlled over DI functions 
from other modules, and, for example, using the xmlrpc2di module, 
the conference rooms can be controlled via XMLRPC.

It implements conference rooms with dial-in and conference room entry
via DTMF, and authenticated dial-out.

For dial-in, usually the user is asked to enter the conference room 
number via keypad, followed by the star key.

In the configuration, a regular expression can be defined (direct_room_re),
which, if matched to the user part of the request uri, connects the caller 
directly to the conference room. direct_room_strip sets how many characters
should be stripped from the user part in order to obtain the conference room 
number.

Participants can be listed, kicked out, muted and unmuted over DI 
(using xmlrpc2di over XMLRPC).

You will probably want to load uac_auth and xmlrpc2di modules. 

There is some very simple feedback and call statistics functionality, which 
will save its results to a log file.

An admin PIN can be set, which serves to retrieve room PINs (for site administrator
or the like).

implemented DI functions:

All functions return as extra parameter the serverInfo, a status line showing the 
SEMS version, and current call statistics.

----
roomCreate(string room):
   int code, string result, string adminpin

  code/result:
         0    OK
         1    room already open
----
roomInfo(string room, string adminpin):
   int code, string result, list<participant> participants
   participant: string call_tag, string number, int status, string reason, int muted

  status:
         0    Disconnected
         1    Connecting
         2    Ringing
         3    Connected
         4    Disconnecting
   reason: e.g. "200 OK", "606 Declined", ...

  code/result:
         0    OK
         1    wrong adminpin
----
dialout(string room, string adminpin, string callee,
        string from_user, string domain,
        string auth_user, string auth_pwd [, headers]) :
     int code, string result, string callid

   code/result:
          0     OK
          1     wrong adminpin
	  2     failed
----
kickout(string room, string adminpin, string call_tag) :
     int code, string result

   code/result:
          0     OK
          1     wrong adminpin
	  2     call does not exist in room
----
mute(string room, string adminpin, string call_tag) :
     int code, string result

   code/result:
          0     OK
          1     wrong adminpin
	  2     call does not exist in room
----
unmute(string room, string adminpin, string call_tag) :
     int code, string result

   code/result:
          0     OK
          1     wrong adminpin
	  2     call does not exist in room
----
serverInfo():
      string name,
      int load,
      int cpu
----
getRoomPassword(string master_pwd, string room)
    int code, string result
----
listRooms(string master_pwd)
    int code, string result
----

additionally there is feedback functions to save call quality reports 
from users: vqRoomFeedback, vqCallFeedback, vqConferenceFeedback.
resetFeedback, flushFeedback can be used to manipulate the feedback files.

getRoomPassword and listRooms in only available if master password is set 
in webconference.conf



    
prompt suggestions: 
------------------
entering_conference: You are now entering the conference room.
first_participant: You are the first participant in the conference.
pin_prompt: Welcome to iptel dot org conference. Please enter your room number, followed by the pound key.
wrong_pin: The room number is not correct. Please try again.

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