Upstream update. Major changes between sudo 1.7.2p8 and 1.7.3: * Support for logging I/O for the command being run. For more information, see the documentation for the "log_input" and "log_output" Defaults options in the sudoers manual. Also see the sudoreplay manual for how to replay I/O log sessions. * The use_pty sudoers option can be used to force a command to be run in a pseudo-pty, even when I/O logging is not enabled. * On some systems, sudo can now detect when a user has logged out and back in again when tty-based time stamps are in use. Supported systems include Solaris systems with the devices file system, Mac OS X, and Linux systems with the devpts filesystem (pseudo-ttys only). * On AIX systems, the registry setting in /etc/security/user is now taken into account when looking up users and groups. Sudo now applies the correct the user and group ids when running a command as a user whose account details come from a different source (e.g. LDAP or DCE vs. local files). * Support for multiple 'sudoers_base' and 'uri' entries in ldap.conf. When multiple entries are listed, sudo will try each one in the order in which they are specified. * Sudo's SELinux support should now function correctly when running commands as a non-root user and when one of stdin, stdout or stderr is not a terminal. * Sudo will now use the Linux audit system with configure with the --with-linux-audit flag. * Sudo now uses mbr_check_membership() on systems that support it to determine group membership. Currently, only Darwin (Mac OS X) supports this. * When the tty_tickets sudoers option is enabled but there is no terminal device, sudo will no longer use or create a tty-based ticket file. Previously, sudo would use a tty name of "unknown". As a consequence, if a user has no terminal device, sudo will now always prompt for a password. * The passwd_timeout and timestamp_timeout options may now be specified as floating point numbers for more granular timeout values. * Negating the fqdn option in sudoers now works correctly when sudo is configured with the --with-fqdn option. In previous versions of sudo the fqdn was set before sudoers was parsed.