psqlodbc - psqlodbc: 1) Added --with(out)-libpq[=DIR} option to

Log Message:
-----------

1) Added --with(out)-libpq[=DIR} option to configure.
2) Revise autoconf/automake so that libpq/ssl header/libs are resolved at configure phase.
3) Use md5.c directly instead of win_md5.c.
4) Suppress some compiler warnings.

Modified Files:
--------------
psqlodbc:
Makefile.am (r1.52 -> r1.53)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/Makefile.am?r1=1.52&r2=1.53)
configure.ac (r1.82 -> r1.83)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/configure.ac?r1=1.82&r2=1.83)
connection.c (r1.183 -> r1.184)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/connection.c?r1=1.183&r2=1.184)
loadlib.c (r1.17 -> r1.18)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/loadlib.c?r1=1.17&r2=1.18)
loadlib.h (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/loadlib.h?r1=1.8&r2=1.9)
md5.c (r1.12 -> r1.13)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/md5.c?r1=1.12&r2=1.13)
socket.h (r1.42 -> r1.43)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/socket.h?r1=1.42&r2=1.43)
version.h (r1.148 -> r1.149)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/version.h?r1=1.148&r2=1.149)
win32.mak (r1.54 -> r1.55)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/win32.mak?r1=1.54&r2=1.55)
win64.mak (r1.9 -> r1.10)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/win64.mak?r1=1.9&r2=1.10)
psqlodbc/installer:
psqlodbcm.wxs (r1.21 -> r1.22)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/installer/psqlodbcm.wxs?r1=1.21&r2=1.22)