Most platforms do not required this. However older 4.3 BSD do not
have a posix regex library.
+S/Key Libraries:
+http://www.sparc.spb.su/solaris/skey/
+
+If you wish to use --with-skey then you will need the above library
+installed. No other current S/Key library is currently known to be
+supported.
2. Building / Installation
--------------------------
to work. Use the optional PATH argument to specify the root of your
AFS installation. AFS requires Kerberos support to be enabled.
---with-skey will enable S/Key one time password support. You will need
-the S/Key libraries and header files installed for this to work.
+--with-skey=PATH will enable S/Key one time password support. You will
+need the S/Key libraries and header files installed for this to work.
--with-tcp-wrappers will enable TCP Wrappers (/etc/hosts.allow|deny)
support. You will need libwrap.a and tcpd.h installed.