print usage and bail if the user gives an unknown command line option
ssdp: improve debug logging
Wrap up version 1.1.2.
cleanup: remove unused tagutils code, and switch to standard int types
log: enhance setting loglevels

Enable logging level settings such as 'log_level=error' to set all
levels to error, or 'log_level=error,ssdp=maxdebug' to override only one
category
samsung: fix root_container setting

Pretend that we don't support SamsungGetFeatureList if we have a
custom root container specified, or else the Samsung client will
jump straight to our normal A/V/P sections.
portability: rework inline functions for clang compatibility.
Fix Clang compiler warnings.
portability: fix compiling on systems without iconv