up to 1.4.42

up to 1.4.42

Important changes

 - new modules, expanded features, rewritten auth framework
 - fix bugs introduced in 1.4.40/1.4.41

Highlights

* new modules, expanded features
  * performance: use extended socket/file syscalls and flags
  * rewritten auth framework
    * updated mod_authn_ldap
    * new mod_authn_gssapi
    * new mod_authn_mysql
  * new mod_deflate
  * new mod_geoip
  * new mod_uploadprogress
  * mod_dirlisting sortable columns
  * mod_fastcgi support for authorizer, responder keyed with same path/extension
  * mod_cgi permit CGI exec of unreadable files
  * mod_scgi support for uwsgi protocol for Python WSGI backends
  * add some SSL_* variables to CGI environment
* bug fixes
  * remove preemptive shutdown() to backend
  * fix backend socket connect issue: enforce wait for POLLWR after EINPROGRESS
  * fix crash if ready events on abandoned fd
  * fix broken digest auth
* behavior changes
  * behavior change in mod_ssi to conform to same CGI env as CGI, FastCGI, SCGI:
  * REQUEST_URI is original client request, instead of URI modified by mod_rewrite.
  * DOCUMENT_ROOT changes if mod_alias or mod_userdir changes basedir.