[COMMITTERS] pgsql: Update GUC description for kerberos usernames.

[Bruce Momjian]

Log Message:
-----------
Update GUC description for kerberos usernames.

Modified Files:
--------------
    pgsql/src/backend/utils/misc:
        guc.c (r1.266 -> r1.267)
        
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/guc.c.diff?r1=1.266&r2=1.267)

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