control: volume control: retrieve volume min/max params from service description
restore capability to set up libupnp log
Missing config.h in vdir.cxx resulted in different off_t sizes in libupnp's
and libupnpp's File_Info struct. The problem then manifested itself by the
device not appearing on the network and
"VirtualDir::getFile: no dir: /description.xml/" messages in the log
because the shifted data made libupnp think that the entry was a directory
Restore other instances of config.h inclusions suppressed by include-what-you-need (or less...)