string needs to be unpacked

https://github.com/dls-controls/ethercat/blob/master/ethercatApp/src/ecAsyn.cpp

The method receive_config_on_connect has debugging messages that attempt to print the configuration received from the scanner.
printf is called on the config_buffer "raw". However the scanner sends the configuration packed and the message includes the length of the following string.
So the output is garbled. Example output from ioc running version 4-3

[Fri Nov 13 18:47:58 2015]getting config
[Fri Nov 13 18:47:58 2015]config-file size:111970
[Fri Nov 13 18:47:58 2015]^D
[Fri Nov 13 18:47:58 2015]***********************\*