pgsql: The attached patch updates the thread test program to run

Log Message:
-----------
The attached patch updates the thread test program to run stand-alone on
Windows. The test itself is bypassed in configure as discussed, and
libpq has been updated appropriately to allow it to build in thread-safe
mode.

Dave Page

Modified Files:
--------------
pgsql:
configure (r1.449 -> r1.450)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.diff?r1=1.449&r2=1.450)
configure.in (r1.422 -> r1.423)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in.diff?r1=1.422&r2=1.423)
pgsql/src/interfaces/libpq:
Makefile (r1.136 -> r1.137)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/Makefile.diff?r1=1.136&r2=1.137)
fe-connect.c (r1.319 -> r1.320)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-connect.c.diff?r1=1.319&r2=1.320)
fe-exec.c (r1.173 -> r1.174)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-exec.c.diff?r1=1.173&r2=1.174)
fe-misc.c (r1.118 -> r1.119)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-misc.c.diff?r1=1.118&r2=1.119)
fe-print.c (r1.62 -> r1.63)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-print.c.diff?r1=1.62&r2=1.63)
fe-secure.c (r1.69 -> r1.70)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-secure.c.diff?r1=1.69&r2=1.70)
libpq-int.h (r1.106 -> r1.107)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/libpq-int.h.diff?r1=1.106&r2=1.107)
pthread-win32.c (r1.7 -> r1.8)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/pthread-win32.c.diff?r1=1.7&r2=1.8)
pgsql/src/tools/thread:
README (r1.6 -> r1.7)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/tools/thread/README.diff?r1=1.6&r2=1.7)
thread_test.c (r1.39 -> r1.40)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/tools/thread/thread_test.c.diff?r1=1.39&r2=1.40)