Shibboleth-specific authorizer changes
Shibboleth-specific authorizer changes

This mostly follows the FastCGI Authorizer specification, with the
exception of the processing of the request and response bodies, and
variable naming.

See http://forum.nginx.org/read.php?2,238523,238523#msg-238523
for a lengthier discussion.

Signed-off-by: Luca Bruno <54b63133bb17564df145c2c274f1bc31eb9aa743@rocket-internet.de>

vidiecan/nginx-http-shibboleth