SendURL() — Sends the specified URL to the channel (if supported)
Requests that the client go to the specified URL. The
      application also sets a channel variable named SENDURLSTATUS to one of the following values
      upon completion:
SUCCESS
            The transmission of the URL was successful.
FAILURE
            The transmission of the URL failed.
NOLOAD
            The is web-enabled but failed to load the URL.
NOSUPPORT
            The underlying channel does not support the transmission of the URL.
If the options parameter contains the
      wait option, execution will wait for
      an acknowledgment that the URL has been loaded before continuing.
If the options parameter contains the
      j option and the client does not
      support HTML transport, and there exists a priority n+101 (where n is the number of the current priority),
      execution will continue at that step.
          exten => 123,1,SendURL(www.asterisk.org,wait)