fixed compile issues with apache 2.4
more Apache 2.4 maintainance fixes

r->connection->remote_ip now r->useragent_ip
added -lcrypto (SHA1 was missing when linked)
added extra param to authz callback
added custom AUTHZ_DENIED_NO_USER return if user authn data not passed

now tested
Merge branch 'master' into debian
use correct version
add git-buildpackage configuration
rename package from libapache2-mod-authn-restauth to libapache2-mod-authnz-restauth
add misc:Depends to dummy package
attempt to harden
Use hardening-wrapper to provide hardened binaries
enable all hardening options