SQL optimization:

SQL optimization:
  put _cached_html from pagedata into a new seperate blob, not huge serialized string.
  it is only rarelely needed: for current page only, if-not-modified
  but was extracted for every simple page iteration.

git-svn-id: svn://svn.code.sf.net/p/phpwiki/code/trunk@4259 96ab9672-09ca-45d6-a79d-3d69d39ca109