mod_h[ttp]2 v1.12.0

• H2Upgrade can be configured per directory/location. Test case added.
• H2Push can be disabled per directory/location. Test case added.
• Configuration rework to open up several directives for use in locations and directories
  and .htaccess files.
• Merging changes from httpd/trunk + httpd/branches/2.4.x to have a unified source again.