* Detect vim-gtk2. Pointed out by nonaka@.
per maintainer update request by PR pkg/47889 from repelase notes: * better man page detection heuristics, when detection by process tree fails
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.