Changes to support win32 builds with Visual Studio.

This change involves removing dependencies on postgres.h and related
server files.  win32.mak files were created as well + other
header and define changes needed for win32 builds with Visual Studio.

To build with Visual Studio set environment variables like

PG_LIB=C:\Postgresql\9.0\lib
PG_INC=C:\Postgresql\9.0\include
PGSHARE="C:\\Postgresql\\9.0\\share"
PTHREADS_LIB=C:\pthreads\lib
PTHREADS_INC=C:\pthreads\include
GETTEXT_LIB=C:\gettext\lib

then build with
nmake /f win32.mak slon.exe
nmake /f win32.mak slonik.exe
nmake /f win32.mak slony1_funcs.dll

in each of src/slon src/slonik src/backend respectivly

Thanks to sachin.srivastava at enterprisedb.com for some of the changes.

Branch
------
REL_2_0_STABLE

Details
-------
http://git.postgresql.org/gitweb?p=slony1-engine.git;a=commitdiff;h=567c9a9c289184a2e3aa9fe3924c1d49a2397ed9

Modified Files
--------------
config_msvc.h                               |   21 +
src/backend/slony1_funcs.c                  |    5 +
src/backend/slony1_funcs.def                |    9 +
src/backend/win32.mak                       |   14 +
src/parsestatements/Makefile                |    6 +-
src/parsestatements/test_sql.expected.win32 |  Bin 6309 -> 6306 bytes
src/slon/cleanup_thread.c                   |    6 +-
src/slon/conf-file.l                        |    5 +-
src/slon/confoptions.c                      | 1518 ++++++++++++++-------------
src/slon/confoptions.h                      |   11 +-
src/slon/dbutils.c                          |    6 +-
src/slon/local_listen.c                     |    7 +-
src/slon/misc.c                             |    7 +-
src/slon/port/pipe.c                        |   14 +-
src/slon/port/win32service.c                |    3 +
src/slon/remote_listen.c                    |    6 +-
src/slon/remote_worker.c                    |   14 +-
src/slon/runtime_config.c                   |    4 +-
src/slon/scheduler.c                        |    7 +-
src/slon/slon.c                             |    5 +-
src/slon/slon.h                             |   18 +-
src/slon/sync_thread.c                      |    7 +-
src/slon/types.h                            |   96 ++
src/slon/win32.mak                          |   71 ++
src/slonik/dbutil.c                         |   11 +-
src/slonik/parser.y                         |    2 +-
src/slonik/scan.l                           |    2 +-
src/slonik/slonik.c                         |   89 +-
src/slonik/slonik.h                         |   10 +-
src/slonik/types.h                          |  101 ++
src/slonik/win32.mak                        |   32 +
31 files changed, 1270 insertions(+), 837 deletions(-)