cleaning up

[Jeremy Lavergne]

> When an install/upgrade of forced with -f port renames the existing file appending and extension .mp_<numbers>, correct?

Yup.

> Is <number> a timestamp or something else?

Yup.

> Is there a port command for cleaning/deleting these files?

Nope, try:
find $prefix -name *.mp<number> -exec rm -rf {} \;

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