Requires the latest v3.20a for sytem.matchuserdata() to support deleted and
inactive user record searching.

This is part of the fix for the issue described in issue #513 where the
UEDIT sysop command was falling back (displaying/editing) user #1 because
the sysop-specified user number or alias was not an active user account.

The fallback to display/editing user #1 still happens, but first we try
really hard to find the user that the sysop specified as an argument to
the UEDIT command.