freeradius security, bug fix, and enhancement update

[2.2.6-4]

• Move OpenSSL init out of version check
  Resolves: Bug#1189394 radiusd segfaults after update
• Comment-out ippool-dhcp.conf inclusion
  Resolves: Bug#1189386 radiusd fails to start after ‘clean’ installation
  [2.2.6-3]
• Disable OpenSSL version check
  Resolves: Bug#1189011
  [2.2.6-2]
• Fix a number of new Coverity errors and compiler warnings.
  Resolves: Bug#1188598
  [2.2.6-1]
• Upgrade to the latest upstream release v2.2.6
  Resolves: Bug#921563 raddebug not working correctly
  Resolves: Bug#921567 raddebug -t 0 exists immediately
  Resolves: Bug#1060319 MSCHAP Authentication is not working using automatic
  windows user credentials
  Resolves: Bug#1078736 Rebase FreeRADIUS to 2.2.4
  Resolves: Bug#1135439 Default message digest defaults to sha1
  Resolves: Bug#1142669 EAP-TLS and OCSP validation causing segmentation
  fault
  Resolves: Bug#1173388 dictionary.mikrotik missing Attributes
• Remove radutmp rotation
  Resolves: Bug#904578 radutmp should not rotate
• Check for start_servers not exceeding max_servers
  Resolves: Bug#1146828 radiusd silently fails when start_servers is higher
  than max_servers