Change some of the parser's parameter names:

Change some of the parser's parameter names:

* Rename param:parser-canonicalize-symbols? to param:parser-fold-case?.

* Rename param:parser-enable-file-attributes-parsing? to
  param:parser-enable-attributes?.

* Eliminate unnecessary *parser-enable-file-attributes-parsing?*
  and *parser-keyword-style*.

* Change port properties to eliminate *...* and use new names.