Click2Call: Add mute to physical phone URI actions

[edospadoni]

NethVoice CTI via phone island can invoke the supported landline APIs to perform these actions:

• call
• answer
• hold_unhold
• dtmf

Add mute/unmute action.

Yealink
http://$PHONE_USER:$PHONE_PASS@$PHONE_IP/servlet?key=MUTE

Snom

http://$PHONE_USER:$PHONE_PASS@$PHONE_IP/command.htm?key=MUTE

Fanvil

http://$PHONE_USER:$PHONE_PASS@$PHONE_IP/cgi-bin/ConfigManApp.com?key=F_MUTE