+ <item>
+ <p>
+ This value <em>must not</em> be used, because it was
+ the error return sentinel value when <tt>uid_t</tt>
+ was 16 bits.
+ </p>
+ </item>
+
+ <tag>65536-4294967293:</tag>
+ <item>
+ <p>
+ Dynamically allocated user accounts. By
+ default <prgn>adduser</prgn> will not allocate UIDs
+ and GIDs in this range, to ease compatibility with
+ legacy systems where <tt>uid_t</tt> is still 16
+ bits.
+ </p>
+ </item>
+
+ <tag>4294967294:</tag>
+ <item>
+ <p>
+ <tt>(uid_t)(-2) == (gid_t)(-2)</tt> <em>must not</em> be
+ used, because it is used as the anonymous, unauthenticated
+ user by some NFS implementations.
+ </p>
+ </item>
+
+ <tag>4294967295:</tag>