Log Message:
Initial import of lua-expat from pkgsrc-wip, packaged by pancake.

LuaExpat is a XML parser based on the Expat XML parser.
It allows Lua programs to:

- Process a XML document incrementally , thus being able to handle
  huge documents without memory penalties;

- Register handler functions wich are called by the parser during
  the processing of the document, handling the document elements or text.