Syslog username length

[Todd C. Miller]

In message <886FDDC53963EB42AB925FC8F2AE115102E6ADE9 at ccc2kxch01.ceco.com>
	so spake  (donald.ritchey):

> In many UNIX versions, the maximum length of a user name is limited to eight
> characters.  This constant reflects that limit.  On many newer versions of
> UNIX (Linux comes to mind) this limit is no longer in effect.  There may be
> an operating system constant that holds the local limit, but I am not sure
> that it is consistent across all versions.

Exactly.  Sudo should probably try to figure out the max username
based on the size of ut_name/ut_user in struct utmp.

 - todd