Merge branch 'ab/generate-command-list'

Build optimization. * ab/generate-command-list: generate-cmdlist.sh: don't parse command-list.txt thrice generate-cmdlist.sh: replace "grep' invocation with a shell version generate-cmdlist.sh: do not shell out to "sed" generate-cmdlist.sh: stop sorting category lines generate-cmdlist.sh: replace for loop by printf's auto-repeat feature generate-cmdlist.sh: run "grep | sort", not "sort | grep" generate-cmdlist.sh: don't call get_categories() from category_list() generate-cmdlist.sh: spawn fewer processes generate-cmdlist.sh: trivial whitespace change command-list.txt: sort with "LC_ALL=C sort"