CGI-4.09 - Handle Common Gateway Interface requests and responses

Changes for version 4.09 - 2014-10-21

RELEASE NOTES
- with this release the large backlog of issues against CGI.pm has been cleared. All fixes have been made in the versions 4.00 and above so if you are upgrading from 3.* you should thoroughly test your code against recent versions of CGI.pm
- an effort has been made to retain back compatibility against previous versions of CGI.pm for any fixes made, however some changes related to the handling of temporary files may have consequences for your code
- please refer to the RELEASE NOTES for version 4.00 and above for all recent changes and file an issue on github if there has been a regression.
- please do *NOT* file issues regarding HTML generating functions, these are no longer being maintained (see perldoc for rational)
SPEC / BUG FIXES
- tweak url to DTRT when the web server is IIS (RT #89827 / GH #152)
- fix temporary file handling when dealing with multiple files in MIME uploads (GH #154, thanks to GeJ for the test case)