pgsql: Put function expressions and values lists into FunctionScan and

Log Message:
-----------
Put function expressions and values lists into FunctionScan and ValuesScan
plan nodes, so that the executor does not need to get these items from
the range table at runtime.  This will avoid needing to include these
fields in the compact range table I'm expecting to make the executor use.

Modified Files:
--------------
    pgsql/src/backend/commands:
        explain.c (r1.154 -> r1.155)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/explain.c.diff?r1=1.154&r2=1.155)
    pgsql/src/backend/executor:
        execAmi.c (r1.91 -> r1.92)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execAmi.c.diff?r1=1.91&r2=1.92)
        nodeFunctionscan.c (r1.42 -> r1.43)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeFunctionscan.c.diff?r1=1.42&r2=1.43)
        nodeValuesscan.c (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeValuesscan.c.diff?r1=1.5&r2=1.6)
    pgsql/src/backend/nodes:
        copyfuncs.c (r1.365 -> r1.366)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/copyfuncs.c.diff?r1=1.365&r2=1.366)
        outfuncs.c (r1.297 -> r1.298)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/outfuncs.c.diff?r1=1.297&r2=1.298)
    pgsql/src/backend/optimizer/plan:
        createplan.c (r1.224 -> r1.225)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/plan/createplan.c.diff?r1=1.224&r2=1.225)
        setrefs.c (r1.129 -> r1.130)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/plan/setrefs.c.diff?r1=1.129&r2=1.130)
        subselect.c (r1.118 -> r1.119)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/plan/subselect.c.diff?r1=1.118&r2=1.119)
    pgsql/src/include/nodes:
        plannodes.h (r1.89 -> r1.90)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/plannodes.h.diff?r1=1.89&r2=1.90)