fix 'which' function behavior with absolute paths

	# 'command -v' replacement does not work exactly the same way. it outputs shell aliases if present

	# $1 - executable name

	local IFS=:

	[ "$1" != "${1#/}" ] && [ -x "$1" ] && {

		echo "$1"

		return 0

	}

	for p in $PATH; do

	    [ -x "$p/$1" ] && {

		echo "$p/$1"