Reason for some GPIOs connected together

With reference to the BeagleBone Schematic, we see that some of the GPIOs are connected to each other through 0 ohm resistors before coming to the expansion headers.

What is the intention behind this?

The pins paralleled like this are (C18 and B12), (R13 and T13). Please see the two attached images.

Image 1

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Image 2

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