Change resjunk to a boolean.

src/backend/executor/execJunk.c

src/backend/nodes/makefuncs.c

src/backend/nodes/outfuncs.c

src/backend/nodes/readfuncs.c

src/backend/optimizer/plan/planner.c

src/backend/optimizer/prep/preptlist.c

src/backend/optimizer/util/tlist.c

src/backend/parser/analyze.c

src/backend/parser/parse_clause.c

src/backend/parser/parse_func.c

src/backend/parser/parse_relation.c

src/backend/parser/parse_target.c

src/backend/rewrite/rewriteHandler.c

src/include/nodes/makefuncs.h

src/include/nodes/primnodes.h

src/include/parser/parse_target.h

src/man/explain.l