Log Message:
Update pkgtools/pkglint to 23.1.0

Changes since 22.4.1:

In makefiles outside pkgsrc, don't require the first line to contain the
CVS Id.

When simplifying conditions, correctly handle the edge case that a
single-word value may evaluate numerically to zero.

In dependency lines, parse '#' signs correctly.

In error messages about malformed patch files, use the correct plural
form.