pgsql: Some small editorialization on the protocol documentation for

Log Message:
-----------
Some small editorialization on the protocol documentation for GSSAPI/SSPI
authentication.

Modified Files:
--------------
pgsql/doc/src/sgml:
protocol.sgml (r1.72 -> r1.73)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/protocol.sgml?r1=1.72&r2=1.73)