pgsql-server: Use one, not zero, as the default lower bound for arrays

Log Message:
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Use one, not zero, as the default lower bound for arrays of AclItems.
This avoids changing the displayed appearance of ACL columns now that
array_out decorates its output with bounds information when the lower
bound isn't one.  Per gripe from Gaetano Mendola.  Note that I did not
force initdb for this, although any database initdb'd in the last
couple of days is going to have some problems.

Modified Files:
--------------
    pgsql-server/src/backend/utils/adt:
        acl.c (r1.108 -> r1.109)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/utils/adt/acl.c.diff?r1=1.108&r2=1.109)
    pgsql-server/src/include/utils:
        acl.h (r1.72 -> r1.73)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/include/utils/acl.h.diff?r1=1.72&r2=1.73)