httpd security, bug fix, and enhancement update

[2.4.6-31.0.1]

• replace index.html with Oracle’s index page oracle_index.html
  [2.4.6-31]
• mod_proxy_fcgi: determine if FCGI_CONN_CLOSE should be enabled
  instead of hardcoding it (#1168050)
• mod_proxy: support Unix Domain Sockets (#1168081)
  [2.4.6-30]
• core: fix bypassing of mod_headers rules via chunked requests (CVE-2013-5704)
• mod_cache: fix NULL pointer dereference on empty Content-Type (CVE-2014-3581)
  [2.4.6-29]
• rebuild against proper version of OpenSSL (#1080125)
  [2.4.6-28]
• set vstring based on /etc/os-release (#1114123)
  [2.4.6-27]
• fix the dependency on openssl-libs to match the fix for #1080125
  [2.4.6-26]
• allow
  'es to be seen under virtual hosts (#1131847)
  [2.4.6-25]
• do not use hardcoded curve for ECDHE suites (#1080125)
  [2.4.6-24]
• allow reverse-proxy to be set via SetHandler (#1136290)
  [2.4.6-23]
• fix possible crash in SIGINT handling (#1131006)
  [2.4.6-22]
• ab: fix integer overflow when printing stats with lot of requests (#1092420)
  [2.4.6-21]
• add pre_htaccess so mpm-itk can be build as separate module (#1059143)
  [2.4.6-20]
• mod_ssl: prefer larger keys and support up to 8192-bit keys (#1073078)