configurable sip params

src/freedombone

       if grep -q "VOIP_SERVER_PASSWORD" $CONFIGURATION_FILE; then
           VOIP_SERVER_PASSWORD=$(grep "VOIP_SERVER_PASSWORD" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
       fi
+      if grep -q "SIP_PORT" $CONFIGURATION_FILE; then
+          SIP_PORT=$(grep "SIP_PORT" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
+      fi
+      if grep -q "SIP_SERVER_PASSWORD" $CONFIGURATION_FILE; then
+          SIP_SERVER_PASSWORD=$(grep "SIP_SERVER_PASSWORD" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
+      fi
       if grep -q "GET_IP_ADDRESS_URL" $CONFIGURATION_FILE; then
           GET_IP_ADDRESS_URL=$(grep "GET_IP_ADDRESS_URL" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
       fi