main/apache2: security upgrade to 2.2.22 (CVE-2012-0021, CVE-2012-0031, CVE-2012-0053, CVE-2011-3368)

low: mod_log_config crash CVE-2012-0021
low: scoreboard parent DoS CVE-2012-0031
moderate: error responses can expose cookies CVE-2012-0053
moderate: mod_proxy reverse proxy exposure CVE-2011-3368

This release also include the previosly patched:
low: mod_setenvif .htaccess privilege escalation CVE-2011-3607
moderate: mod_proxy reverse proxy exposure CVE-2011-4317

fixes #982