httpd security, bug fix, and enhancement update

[2.2.15-26.0.1.el6]

• replace index.html with Oracle’s index page oracle_index.html
  update vstring in specfile
  [2.2.15-26]
• htcacheclean: exit with code 4 also for ‘restart’ action (#805810)
  [2.2.15-25]
• htcacheclean: exit with code 4 if nonprivileged user runs initscript (#805810)
• rotatelogs: omit the second arg when invoking a post-rotate program (#876923)
  [2.2.15-24]
• mod_ssl: improved patch for mod_nss fallback (w/mharmsen, #805720)
  [2.2.15-23]
• mod_log_config: fix cookie parsing substring mismatch (#867268)
  [2.2.15-22]
• mod_cache: fix header merging for 304 case, thanks to Roy Badami (#868283)
• mod_cache: fix handling of 304 responses (#868253)
  [2.2.15-21]
• mod_proxy_ajp: ignore flushing if headers have not been sent (#853160)
• mod_proxy_ajp: do not mark worker in error state when one request
  timeouts (#864317)
• mod_ssl: do not run post script if all files are already created (#752618)
  [2.2.15-20]
• add htcacheclean init script (Jan Kaluza, #805810)
  [2.2.15-19]
• mod_ssl: fall back on another module’s proxy hook if mod_ssl proxy
  is not configured. (#805720)
  [2.2.15-18]
• add security fix for CVE-2012-2687 (#850794)
  [2.2.15-17]
• mod_proxy: allow change BalancerMember state in web interface (#748400)
• mod_proxy: Tone down ‘worker [URL] used by another worker’ warning (#787247)
• mod_proxy: add support for ‘failonstatus’ option (#824571)
• mod_proxy: avoid DNS lookup on hostname from request URI if
  ProxyRemote* is configured (#837086)
• rotatelogs: create files even if they are empty (#757739)
• rotatelogs: option to rotate files into a custom location (#757735)
• rotatelogs: add support for -L option (#838493)
• fix handling of long chunk-line (#842376)
• add server aliases to ‘httpd -S’ output (#833092)
• omit %posttrans daemon restart if
  /etc/sysconfig/httpd-disable-posttrans exists (#833064)
• mod_ldap: treat LDAP_UNAVAILABLE as a transient error (#829689)
• ab: fix double free when SSL request fails in verbose mode (#837613)
• mod_cache: do not cache partial results (#822587)
• mod_ldap: add LDAPReferrals directive alias (#796958)
• mod_ssl: add _userID DN variable suffix for NID_userId (#842375)
• mod_ssl: fix test for missing decrypted private keys, and ensure that
  the keypair matches (#848954)
• mod_authnz_ldap: set AUTHORIZE_* variables in LDAP authorization (#828896)
• relax checks for status-line validity (#853348)
  [2.2.15-16]
• add security fixes for CVE-2011-4317, CVE-2012-0053, CVE-2012-0031,
  CVE-2011-3607 (#787599)
• obviates fix for CVE-2011-3638, patch removed