sudo security, bug fix and enhancement update

[1.8.6p3-12]

• added patches for CVE-2013-1775 CVE-2013-2777 CVE-2013-2776
  Resolves: rhbz#1015355

[1.8.6p3-11]

• sssd: fixed a bug in ipa_hostname processing
  Resolves: rhbz#853542

[1.8.6p3-10]

• sssd: fixed buffer size for the ipa_hostname value
  Resolves: rhbz#853542

[1.8.6p3-9]

• sssd: match against ipa_hostname from sssd.conf too when
  checking sudoHost
  Resolves: rhbz#853542

[1.8.6p3-8]

• updated man-page
• fixed handling of RLIMIT_NPROC resource limit
• fixed alias cycle detection code
• added debug messages for tracing of netgroup matching
• fixed aborting on realloc when displaying allowed commands
• show the SUDO_USER in logs, if running commands as root
• sssd: filter netgroups in the sudoUser attribute
  Resolves: rhbz#856901
  Resolves: rhbz#947276
  Resolves: rhbz#886648
  Resolves: rhbz#994563
  Resolves: rhbz#848111
  Resolves: rhbz#994626
  Resolves: rhbz#973228
  Resolves: rhbz#880150