Hi bernie
Is libwiringPi.tcz now a boot script?
No, it's an extension. Since you added a libwiringPi.tcz entry to your onboot.lst file it will be present every time you boot.
A .tcz file is a compressed file system with a directory structure in it that gets mounted under /tmp/tcloop. From there
it gets linked into the main file system. If you enter:
ls -l /usr/local/lib/libwiringPi.so
you should see something like this:
lrwxrwxrwx 1 root root 52 May 10 15:49 /usr/local/lib/libwiringPi.so -> /tmp/tcloop/libwiringPi/usr/local/lib/libwiringPi.so
which shows that /usr/local/lib/libwiringPi.so is really just a link back to your libwiringPi.tcz extension mounted under /tmp/tcloop.