apache: multiple issues

• CVE-2015-0228 (denial of service):

mod_lua: A maliciously crafted websockets PING after a script calls
r:wsupgrade() can cause a child process crash.

• CVE-2015-0253 (denial of service):

Fix a crash with ErrorDocument 400 pointing to a local URL-path with the
INCLUDES filter active, introduced in 2.4.11. PR 57531.

• CVE-2015-3183 (denial of service):

core: Fix chunk header parsing defect. Remove apr_brigade_flatten(),
buffering and duplicated code from the HTTP_IN filter, parse chunks in a
single pass with zero copy. Limit accepted chunk-size to 2^63-1 and be
strict about chunk-ext authorized characters.

• CVE-2015-3185 (authentication bypass):

Replacement of ap_some_auth_required (unusable in Apache httpd 2.4) with
new ap_some_authn_required and ap_force_authn hook.