pgsql: Make backend header files C++ safe This alters various

Log Message:
-----------
Make backend header files C++ safe

This alters various incidental uses of C++ key words to use other similar
identifiers, so that a C++ compiler won't choke outright. You still
(probably) need extern "C" { }; around the inclusion of backend headers.

based on a patch by Kurt Harriman <harriman(at)acm(dot)org>

Also add a script cpluspluscheck to check for C++ compatibility in the
future. As of right now, this passes without error for me.

Modified Files:
--------------
pgsql/src/backend/access/common:
tupdesc.c (r1.126 -> r1.127)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/common/tupdesc.c?r1=1.126&r2=1.127)
pgsql/src/backend/catalog:
pg_constraint.c (r1.45 -> r1.46)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/pg_constraint.c?r1=1.45&r2=1.46)
pgsql/src/backend/commands:
indexcmds.c (r1.185 -> r1.186)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/indexcmds.c?r1=1.185&r2=1.186)
sequence.c (r1.160 -> r1.161)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/sequence.c?r1=1.160&r2=1.161)
tablecmds.c (r1.289 -> r1.290)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/tablecmds.c?r1=1.289&r2=1.290)
typecmds.c (r1.134 -> r1.135)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/typecmds.c?r1=1.134&r2=1.135)
view.c (r1.116 -> r1.117)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/view.c?r1=1.116&r2=1.117)
pgsql/src/backend/nodes:
copyfuncs.c (r1.432 -> r1.433)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/copyfuncs.c?r1=1.432&r2=1.433)
equalfuncs.c (r1.355 -> r1.356)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/equalfuncs.c?r1=1.355&r2=1.356)
makefuncs.c (r1.64 -> r1.65)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/makefuncs.c?r1=1.64&r2=1.65)
nodeFuncs.c (r1.40 -> r1.41)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/nodeFuncs.c?r1=1.40&r2=1.41)
outfuncs.c (r1.360 -> r1.361)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/outfuncs.c?r1=1.360&r2=1.361)
readfuncs.c (r1.222 -> r1.223)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/readfuncs.c?r1=1.222&r2=1.223)
pgsql/src/backend/optimizer/plan:
subselect.c (r1.151 -> r1.152)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/plan/subselect.c?r1=1.151&r2=1.152)
pgsql/src/backend/optimizer/util:
plancat.c (r1.158 -> r1.159)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/util/plancat.c?r1=1.158&r2=1.159)
pgsql/src/backend/parser:
gram.y (r2.669 -> r2.670)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/gram.y?r1=2.669&r2=2.670)
parse_clause.c (r1.189 -> r1.190)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_clause.c?r1=1.189&r2=1.190)
parse_expr.c (r1.241 -> r1.242)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_expr.c?r1=1.241&r2=1.242)
parse_relation.c (r1.142 -> r1.143)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_relation.c?r1=1.142&r2=1.143)
parse_target.c (r1.171 -> r1.172)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_target.c?r1=1.171&r2=1.172)
parse_type.c (r1.103 -> r1.104)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_type.c?r1=1.103&r2=1.104)
parse_utilcmd.c (r2.22 -> r2.23)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_utilcmd.c?r1=2.22&r2=2.23)
pgsql/src/backend/tcop:
utility.c (r1.309 -> r1.310)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tcop/utility.c?r1=1.309&r2=1.310)
pgsql/src/backend/tsearch:
dict_thesaurus.c (r1.13 -> r1.14)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/dict_thesaurus.c?r1=1.13&r2=1.14)
ts_parse.c (r1.12 -> r1.13)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/ts_parse.c?r1=1.12&r2=1.13)
ts_selfuncs.c (r1.4 -> r1.5)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/ts_selfuncs.c?r1=1.4&r2=1.5)
wparser_def.c (r1.23 -> r1.24)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/wparser_def.c?r1=1.23&r2=1.24)
pgsql/src/backend/utils/adt:
ruleutils.c (r1.302 -> r1.303)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/ruleutils.c?r1=1.302&r2=1.303)
tsginidx.c (r1.16 -> r1.17)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsginidx.c?r1=1.16&r2=1.17)
tsquery.c (r1.20 -> r1.21)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsquery.c?r1=1.20&r2=1.21)
tsquery_cleanup.c (r1.11 -> r1.12)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsquery_cleanup.c?r1=1.11&r2=1.12)
tsquery_op.c (r1.6 -> r1.7)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsquery_op.c?r1=1.6&r2=1.7)
tsquery_rewrite.c (r1.14 -> r1.15)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsquery_rewrite.c?r1=1.14&r2=1.15)
tsquery_util.c (r1.11 -> r1.12)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsquery_util.c?r1=1.11&r2=1.12)
tsrank.c (r1.15 -> r1.16)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsrank.c?r1=1.15&r2=1.16)
tsvector_op.c (r1.23 -> r1.24)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsvector_op.c?r1=1.23&r2=1.24)
pgsql/src/backend/utils/misc:
guc.c (r1.506 -> r1.507)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/guc.c?r1=1.506&r2=1.507)
pgsql/src/backend/utils/mmgr:
mcxt.c (r1.66 -> r1.67)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mmgr/mcxt.c?r1=1.66&r2=1.67)
pgsql/src/include/catalog:
pg_constraint.h (r1.30 -> r1.31)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_constraint.h?r1=1.30&r2=1.31)
pgsql/src/include/commands:
defrem.h (r1.94 -> r1.95)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/commands/defrem.h?r1=1.94&r2=1.95)
tablecmds.h (r1.43 -> r1.44)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/commands/tablecmds.h?r1=1.43&r2=1.44)
pgsql/src/include/nodes:
makefuncs.h (r1.68 -> r1.69)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/makefuncs.h?r1=1.68&r2=1.69)
memnodes.h (r1.35 -> r1.36)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/memnodes.h?r1=1.35&r2=1.36)
parsenodes.h (r1.395 -> r1.396)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/parsenodes.h?r1=1.395&r2=1.396)
primnodes.h (r1.149 -> r1.150)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/primnodes.h?r1=1.149&r2=1.150)
pgsql/src/include/optimizer:
plancat.h (r1.54 -> r1.55)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/optimizer/plancat.h?r1=1.54&r2=1.55)
pgsql/src/include/parser:
parse_type.h (r1.40 -> r1.41)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/parser/parse_type.h?r1=1.40&r2=1.41)
pgsql/src/include/tsearch:
ts_public.h (r1.14 -> r1.15)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/tsearch/ts_public.h?r1=1.14&r2=1.15)
ts_type.h (r1.15 -> r1.16)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/tsearch/ts_type.h?r1=1.15&r2=1.16)
ts_utils.h (r1.17 -> r1.18)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/tsearch/ts_utils.h?r1=1.17&r2=1.18)
pgsql/src/include/utils:
builtins.h (r1.333 -> r1.334)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/builtins.h?r1=1.333&r2=1.334)

Added Files:
-----------
pgsql/src/tools/pginclude:
cpluspluscheck (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/tools/pginclude/cpluspluscheck?rev=1.1&content-type=text/x-cvsweb-markup)