pgsql: Merge Resdom nodes into TargetEntry nodes to simplify code and

Log Message:
-----------
Merge Resdom nodes into TargetEntry nodes to simplify code and save a
few palloc's. I also chose to eliminate the restype and restypmod fields
entirely, since they are redundant with information stored in the node's
contained expression; re-examining the expression at need seems simpler
and more reliable than trying to keep restype/restypmod up to date.

initdb forced due to change in contents of stored rules.

Modified Files:
--------------
pgsql/src/backend/access/common:
printtup.c (r1.87 -> r1.88)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/common/printtup.c.diff?r1=1.87&r2=1.88)
pgsql/src/backend/commands:
view.c (r1.87 -> r1.88)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/view.c.diff?r1=1.87&r2=1.88)
pgsql/src/backend/executor:
execJunk.c (r1.48 -> r1.49)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execJunk.c.diff?r1=1.48&r2=1.49)
execMain.c (r1.244 -> r1.245)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execMain.c.diff?r1=1.244&r2=1.245)
execQual.c (r1.175 -> r1.176)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execQual.c.diff?r1=1.175&r2=1.176)
execTuples.c (r1.86 -> r1.87)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execTuples.c.diff?r1=1.86&r2=1.87)
execUtils.c (r1.119 -> r1.120)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execUtils.c.diff?r1=1.119&r2=1.120)
functions.c (r1.95 -> r1.96)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/functions.c.diff?r1=1.95&r2=1.96)
nodeSubplan.c (r1.67 -> r1.68)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeSubplan.c.diff?r1=1.67&r2=1.68)
pgsql/src/backend/nodes:
copyfuncs.c (r1.299 -> r1.300)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/copyfuncs.c.diff?r1=1.299&r2=1.300)
equalfuncs.c (r1.238 -> r1.239)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/equalfuncs.c.diff?r1=1.238&r2=1.239)
makefuncs.c (r1.46 -> r1.47)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/makefuncs.c.diff?r1=1.46&r2=1.47)
outfuncs.c (r1.245 -> r1.246)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/outfuncs.c.diff?r1=1.245&r2=1.246)
print.c (r1.73 -> r1.74)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/print.c.diff?r1=1.73&r2=1.74)
readfuncs.c (r1.175 -> r1.176)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/readfuncs.c.diff?r1=1.175&r2=1.176)
pgsql/src/backend/optimizer/path:
allpaths.c (r1.124 -> r1.125)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/path/allpaths.c.diff?r1=1.124&r2=1.125)
pathkeys.c (r1.65 -> r1.66)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/path/pathkeys.c.diff?r1=1.65&r2=1.66)
pgsql/src/backend/optimizer/plan:
createplan.c (r1.177 -> r1.178)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/plan/createplan.c.diff?r1=1.177&r2=1.178)
planner.c (r1.181 -> r1.182)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/plan/planner.c.diff?r1=1.181&r2=1.182)
setrefs.c (r1.105 -> r1.106)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/plan/setrefs.c.diff?r1=1.105&r2=1.106)
subselect.c (r1.94 -> r1.95)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/plan/subselect.c.diff?r1=1.94&r2=1.95)
pgsql/src/backend/optimizer/prep:
prepjointree.c (r1.25 -> r1.26)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/prep/prepjointree.c.diff?r1=1.25&r2=1.26)
preptlist.c (r1.73 -> r1.74)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/prep/preptlist.c.diff?r1=1.73&r2=1.74)
prepunion.c (r1.119 -> r1.120)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/prep/prepunion.c.diff?r1=1.119&r2=1.120)
pgsql/src/backend/optimizer/util:
clauses.c (r1.192 -> r1.193)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/util/clauses.c.diff?r1=1.192&r2=1.193)
pathnode.c (r1.114 -> r1.115)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/util/pathnode.c.diff?r1=1.114&r2=1.115)
plancat.c (r1.103 -> r1.104)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/util/plancat.c.diff?r1=1.103&r2=1.104)
tlist.c (r1.68 -> r1.69)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/util/tlist.c.diff?r1=1.68&r2=1.69)
pgsql/src/backend/parser:
analyze.c (r1.316 -> r1.317)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/analyze.c.diff?r1=1.316&r2=1.317)
parse_clause.c (r1.138 -> r1.139)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_clause.c.diff?r1=1.138&r2=1.139)
parse_expr.c (r1.180 -> r1.181)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_expr.c.diff?r1=1.180&r2=1.181)
parse_relation.c (r1.103 -> r1.104)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_relation.c.diff?r1=1.103&r2=1.104)
parse_target.c (r1.130 -> r1.131)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_target.c.diff?r1=1.130&r2=1.131)
pgsql/src/backend/rewrite:
rewriteDefine.c (r1.101 -> r1.102)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/rewrite/rewriteDefine.c.diff?r1=1.101&r2=1.102)
rewriteHandler.c (r1.149 -> r1.150)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/rewrite/rewriteHandler.c.diff?r1=1.149&r2=1.150)
pgsql/src/backend/utils/adt:
ruleutils.c (r1.189 -> r1.190)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/ruleutils.c.diff?r1=1.189&r2=1.190)
pgsql/src/include/catalog:
catversion.h (r1.262 -> r1.263)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/catversion.h.diff?r1=1.262&r2=1.263)
pgsql/src/include/nodes:
makefuncs.h (r1.51 -> r1.52)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/makefuncs.h.diff?r1=1.51&r2=1.52)
nodes.h (r1.164 -> r1.165)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/nodes.h.diff?r1=1.164&r2=1.165)
parsenodes.h (r1.275 -> r1.276)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/parsenodes.h.diff?r1=1.275&r2=1.276)
primnodes.h (r1.106 -> r1.107)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/primnodes.h.diff?r1=1.106&r2=1.107)
pgsql/src/include/optimizer:
tlist.h (r1.41 -> r1.42)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/optimizer/tlist.h.diff?r1=1.41&r2=1.42)
pgsql/src/tools/backend:
index.html (r1.29 -> r1.30)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/tools/backend/index.html.diff?r1=1.29&r2=1.30)