Fix not closing fd when disconnecting on pnat plugin
Fix not closing fd when disconnecting on pnat plugin

This cause problems since the number of open file descriptors are
normaly limited causing errors such as:

  Can't create RFCOMM TTY: Too many open files in system

pstglia/external-bluetooth-bluez,pkarasev3/bluez,pkarasev3/bluez,ComputeCycles/bluez,ComputeCycles/bluez,ComputeCycles/bluez,silent-snowman/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,ComputeCycles/bluez,mapfau/bluez,pkarasev3/bluez,pkarasev3/bluez,pstglia/external-bluetooth-bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,mapfau/bluez,mapfau/bluez,silent-snowman/bluez,mapfau/bluez