Caribiner spacer

Spacer for the smallnetd's carabiner.

That was one of the few carabiners I could find that was wide enough for what I needed, but was a bit too long. This spacer slots tightly into the bottom of the carabiner to remove about 25mm of length without impacting the opening of the gate, leaving about 65mm of internal length.

There are two versions; the standard has an empty center, while the reinforced version has an extra bar down the middle to make it stronger.

Enable supports everywhere.