Add description of CVE-2007-2448.
Add description of CVE-2007-2448.

* www/security/CVE-2007-2448-advisory.txt
  New document.

Suggested by: malcolm

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion