SAPI PARAMETERS
- add XSLTPolicy <display|page|error>, to let user decide
  what to do with documents without a valid <xml-stylesheet
- add XSLTLogStylesheet to let user log how a stylesheet
  was chosen
- correct If-Modified handling as in mails with Patrick
  Ben Koetter

LIBRARY
- !!cleanup the library!!
- initialize and destroy scanner status
  only at init time, not every time a string
  has to be evluated
- use xmlSAXParseFile instead of other standard
  functions
- add XPath _function_ to access mod-xslt variables
- add XPath _function_ to open up another url
  (like open, but with the ability to fake being a client
  and pass over POST parameters and headers)
- add xml instruction for external elements

  MODXSLT_EXPRESSIONS
  - = and ==, problem with long numbers and strings 
  - variables accepted by lex are not the same handled
    by replace string - and are not the same handled by
    value-of!!!

SAPI
- apache 2.0 cacheing 
- apache 1.3 cacheing
- wildcards in mime types
- save xml document from dynamic documents
  only when an error verifies
- error output in html documents
- add some way to load external modules and plugins

CONFIGURE SCRIPT stuff
- add flag to detect flex and bison
- check for pcre version

DONE
* add XSLTForceStylesheet
* apache 1.3 locking issue
* verify apache parameters
* ap_overlay_tables is wrong
* apache conditional stylesheet
* apache 2.0 worker 
* memory leak when calling mxslt_ap2_child_init()

* uhm - very strange ... seems like that accessing
  a file in a forbidden directory causes strange
  errors (chmod 2770 /home/projects)
* build process, update to build library 
  _and_ binaries
* in local urls, use subrequests to avoid 
  denyal of service
* handle server port in local and http
  urls!!!!
* watch out! when making sub requests, switch
  url parameters to those of the new request!!!
* note temporary file name
* delay handling of local urls
* apache1: lookup ip addresses using ioctl
* use two hashing tables to keep parameters
* crash with access denyed

* avoid sapi flags being used for other stuff
* add pthread detection code in configure.ac
* add detection code for xsltCopyTextString, available
  from libxslt 1.0.32 and greater
* add detection code for interface ioctl
* add detection code for nano patch in configure.ac