+What's new in Sudo 1.8.26
+
+ * Fixed a bug in cvtsudoers when converting to JSON format when
+ alias expansion is enabled. Bug #853.
+
+ * Sudo no long sets the USERNAME environment variable when running
+ commands. This is a non-standard environment variable that was
+ set on some older Linux systems.
+
+ * Sudo now treats the LOGNAME and USER environment variables (as
+ well as the LOGIN variable on AIX) as a single unit. If one is
+ preserved or removed from the environment using env_keep, env_check
+ or env_delete, so is the other.
+
What's new in Sudo 1.8.25p1
* Fixed a bug introduced in sudo 1.8.25 that caused a crash on
Notes on upgrading from an older release
========================================
+o Upgrading from a version prior to 1.8.26:
+
+ Starting with version 1.8.26, sudo no long sets the USERNAME
+ environment variable when running commands. This is a non-standard
+ environment variable that was set on some older Linux systems.
+ Sudo still sets the LOGNAME, USER and, on AIX systems, LOGIN
+ environment variables.
+
+ Handling of the LOGNAME, USER (and on AIX, LOGIN) environment
+ variables has changed slightly in version 1.8.26. Sudo now
+ treats those variables as a single unit. This means that if
+ one variable is preserved or removed from the environment using
+ env_keep, env_check or env_delete, the others are too.
+
o Upgrading from a version prior to 1.8.23:
In sudo 1.8.23 the "sudoers2ldif" script and the "visudo -x"