pgsql: Revert temp_tablespaces because of coding problems, per Tom.

Log Message:
-----------
Revert temp_tablespaces because of coding problems, per Tom.

Modified Files:
--------------
pgsql/doc/src/sgml:
config.sgml (r1.114 -> r1.115)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/config.sgml.diff?r1=1.114&r2=1.115)
pgsql/src/backend/commands:
indexcmds.c (r1.155 -> r1.156)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/indexcmds.c.diff?r1=1.155&r2=1.156)
tablecmds.c (r1.215 -> r1.216)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/tablecmds.c.diff?r1=1.215&r2=1.216)
tablespace.c (r1.42 -> r1.43)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/tablespace.c.diff?r1=1.42&r2=1.43)
pgsql/src/backend/executor:
execMain.c (r1.289 -> r1.290)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execMain.c.diff?r1=1.289&r2=1.290)
pgsql/src/backend/storage/file:
fd.c (r1.136 -> r1.137)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/storage/file/fd.c.diff?r1=1.136&r2=1.137)
pgsql/src/backend/utils/misc:
guc.c (r1.378 -> r1.379)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/guc.c.diff?r1=1.378&r2=1.379)
postgresql.conf.sample (r1.211 -> r1.212)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/postgresql.conf.sample.diff?r1=1.211&r2=1.212)
pgsql/src/include/commands:
tablespace.h (r1.15 -> r1.16)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/commands/tablespace.h.diff?r1=1.15&r2=1.16)
pgsql/src/include/utils:
guc.h (r1.79 -> r1.80)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/guc.h.diff?r1=1.79&r2=1.80)