www-apache/mod_security: new version 2.9.1 to fix some bugs.

www-apache/mod_security: new version 2.9.1 to fix some bugs.

There are a few important changes in this version. First, there is a
new USE flag "mlogc" for the audit log collector. USE=curl was too
confusing. Oh, and it actually installs the log collector files now.

Next, I've moved the SecDataDir under /var/lib to eliminate a QA
warning. That's a better place for it anyway, because it doesn't hold
cached data (we have no way to recreate the stuff if it disappears).

I've dropped the code that enables/disables the GeoIP stuff in the
configuration file. We don't need to sed our users' configurations
based on USE flags: they'll set it to what they want, and we should
leave it that way. The flag is still there to pull in the geoip libs.
The configuration file is named 79_mod_security.conf now, for consistency.

There are two completely new flags, USE=json and USE=fuzzyhash to
enable new upstream features. Some missing dependencies were added,
and the docs are being built with doxygen for now.

The following users submitted code and/or suggestions that I've
used. Thanks guys!

  * Chris Frederick
  * Graham E
  * Leho Kraav
  * Mario D. Santana

Gentoo-Bug: 518828
Gentoo-Bug: 594720
Gentoo-Bug: 605496
Gentoo-Bug: 615294

Package-Manager: Portage-2.3.3, Repoman-2.3.1