Merge branch 'jh/alias-i18n'

Extend the alias configuration syntax to allow aliases using
characters outside ASCII alphanumeric (plus '-').

* jh/alias-i18n:
  completion: fix zsh alias listing for subsection aliases
  alias: support non-alphanumeric names via subsection syntax
  alias: prepare for subsection aliases
  help: use list_aliases() for alias listing

diff --cc help.c
Simple merge