Lua: set `lpeg`, `re` as globals; allow shared lib access via require

The `lpeg` and `re` modules are loaded into globals of the respective
name, but they are not necessarily registered as loaded packages. This
ensures that

- the built-in library versions are preferred when setting the globals,
- a shared library is used if pandoc has been compiled without `lpeg`,
  and
- the `require` mechanism can be used to load the shared library if
  available, falling back to the internal version if possible and
  necessary.

0 files changed, 0 insertions, 0 deletions