dnsmasq security, bug fix and enhancement update

[2.48-13]

• Fix the DHCP RELEASE problem when two or more dnsmasq instances are running (rhbz#887156)
  [2.48-12]
• Fixing initscript restart stop functions (rhbz#850944)
  [2.48-11]
• Revert previous changes because of many problems with --bind-dynamic option backport.
• Dropping dnsmasq-2.48-add-bind-dynamic-option.patch
• Set SO_BINDTODEVICE socket option when using --bind-interfaces (rhbz#884957)
  [2.48-10]
• Fixed dnsmasq-2.48-add-bind-dynamic-option.patch
• the option --bind-dynamic was not set correctly when used
  [2.48-9]
• Added cc flag -fno-strict-aliasing to solve Testsuite regressions
  [2.48-8]
• Fix CVE-2012-3411 (rhbz#882251)
  [2.48-7]
• Fix lease-change script (rhbz#815819)
• Check tftp-root exists and is accessible at startup (rhbz#824214)