Revision 155334

add fixes for :
 - CVE-2011-3601, privilege escalation due to a buffer overflow in process_ra()
 - CVE-2011-3602, arbitrary file overwrite
 - CVE-2011-3603, failure to drop privileges
 - CVE-2011-3604, buffer overread and crashes
 - CVE-2011-3605, temporary DOS in process_rs()