Give threads a recognisable name to aid in debugging

NOTE: These thread names are visible in gdb when using 'info threads'.
      Additionally both 'top' and 'ps' show these names *unless* told to
      display the command-line instead of task name.

Signed-off-by: Giel van Schijndel <me@mortis.eu>

src/util.h

@@ -621,9 +621,7 @@ inline void ExitThread(size_t nExitCode)
 }
 #endif
 
-
-
-
+void RenameThread(const char* name);
 
 inline uint32_t ByteReverse(uint32_t value)
 {