www:mod_fastcgi: Update to 2.4.7.1

The website of fastcgi has been down for a long time.
The project is now in a GitHub archive: https://github.com/FastCGI-Archives

Also switch to GitHub with www/mod_fastcgi

Changelog:
*) cast from pointer to integer of different size fix
*) fix prinf %d warning
*) .cvsignore to .gitignore
*) apache 2.4 compile fix

• While I am here, use "make makepatch" for the patches in /files

Approved by: brnrd (apache)
With hat: apache
Sponsored by: Netzkommune GmbH
Differential Revision: https://reviews.freebsd.org/D18471