fix a couple dsc -> dxtc occurences

dune/xt/common/configuration.cc

@@ -259,7 +259,7 @@ void Configuration::setup_()
     logfile_ = boost::filesystem::path(internal::configuration_logfile).string();
   if (has_key("global.datadir") && has_key("logging.dir"))
     logfile_ = (boost::filesystem::path(get<std::string>("global.datadir")) / get<std::string>("logging.dir")
-                / "dsc_parameter.log")
+                / "dxtc_parameter.log")
                    .string();
   logfile_ = boost::filesystem::path(logfile_).string();
 } // ... setup_(...)

dune/xt/common/math.hh

@@ -206,7 +206,7 @@ int signum(T val)
   return (T(0) < val) - (val < T(0));
 }
 
-/** enable us to use DSC::numeric_limits for all types, even when no specialization is avaliable.
+/** enable us to use DXTC::numeric_limits for all types, even when no specialization is avaliable.
  * If there is one, it's used. Otherwise we default to numerical_limtis of double
  **/
 template <class T, typename = void>