Log message:
Update vimpager to 1.8.2.
per maintainer update request by PR pkg/47889

from repelase notes:
 * better man page detection heuristics, when detection by process tree fails

Log message:
Import vimpager-1.8.1 as misc/vimpager.
Based on PR pkg/47679 by NONAKA Kimihiro.

Use ViM as PAGER.

A slightly more sophisticated replacement for less.sh that also supports being
set as the PAGER environment variable.