Log Message:
-----------
Add comment about the use of EXEC_BACKEND.
Modified Files:
--------------
pgsql/src/backend/postmaster:
postmaster.c (r1.564 -> r1.565)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/postmaster.c?r1=1.564&r2=1.565)