Add syscall sandboxing (seccomp-bpf)

src/logging.cpp

@@ -160,6 +160,7 @@ const CLogCategoryDesc LogCategories[] =
     {BCLog::I2P, "i2p"},
     {BCLog::IPC, "ipc"},
     {BCLog::LOCK, "lock"},
+    {BCLog::UTIL, "util"},
     {BCLog::ALL, "1"},
     {BCLog::ALL, "all"},
 };