Log Message:
-----------
Add missing documentation for SSPI packets.
Modified Files:
--------------
pgsql/doc/src/sgml:
protocol.sgml (r1.68 -> r1.69)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/protocol.sgml?r1=1.68&r2=1.69)