Add extra conf for Apache 2.4

Inside a conditional to affect only 2.4, set User, Group, and the
module config to load mpm_event.  This is normally done with the
default configuration files, but since this abbreviated conf bypasses
those, we must set them here.

Signed-off-by: Dan Mick <dan.mick@inktank.com>
(cherry picked from commit 9de5bd1d2302907c59594eb4df8b4d954d5e8e94)
tasks/rgw: get mpm_event frmo mods-available, not mods-enabled

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit 2aae91929f720c54f406b7612631d82b27c98fe6)
tasks/rgw: include mod_authz

As per http://www.webhostingtalk.com/showthread.php?t=1173594

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit 27b7eceeae1e48d0ad8dd820c3b84442bfffa406)
rgw: need alll of mod unixd, version, authz

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit 6392758f1bf503c3bbb2b3ad2f2ee9e6f79d6841)
rgw: httpd instead of httpd.worker

httpd exists on rhel 6.5 too ...

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit f7b32bcc318c4a700628d87826080a043f89a22c)