Make it possible to build with integer datetimes in msvc, and enable by default.

src/tools/msvc/Solution.pm

@@ -83,6 +83,7 @@ sub GenerateFiles {
 		}
 		print O "/* defines added by config steps */\n";
 		print O "#define USE_ASSERT_CHECKING 1\n" if ($self->{options}->{asserts});
+		print O "#define USE_INTEGER_DATETIMES 1\n" if ($self->{options}->{integer_datetimes});
 		print O "#define USE_LDAP 1\n" if ($self->{options}->{ldap});
 		print O "#define HAVE_LIBZ 1\n" if ($self->{options}->{zlib});
 		print O "#define USE_SSL 1\n" if ($self->{options}->{openssl});

src/tools/msvc/config.pl

@@ -4,6 +4,7 @@ use warnings;
 
 our $config = {
 	asserts=>1,			# --enable-cassert
+	integer_datetimes=>1,   # --enable-integer-datetimes
 	nls=>undef,				# --enable-nls=<path>
 	tcl=>'c:\tcl',		# --with-tls=<path>
 	perl=>'c:\perl', 			# --with-perl