Fix vcbuild failures and chkpass dependency caused by 854adb83

Switching the Windows build scripts to use forward slashes instead of
backslashes has caused a couple of issues in VC builds:
- The file tree list was not correctly generated, build script
  generating vcproj file missing tree dependencies when listing items in
  Filter.
- VC builds do not accept file paths with forward slashes, perhaps it
  could be possible to use a Condition but it seems safer to simply
  enforce the file paths to use backslashes in the vcproj files.
- chkpass had an unneeded dependency with libpgport and libpgcommon to
  make build succeed but actually it is not necessary as crypt.c is
  already listed for this project and should be replaced with a fake name
  as it is a unique file.

Michael Paquier

src/tools/msvc/MSBuildProject.pm

@@ -143,7 +143,7 @@ EOF
 
 			# File already exists, so fake a new name
 			my $obj = $dir;
-			$obj =~ s/\\/_/g;
+			$obj =~ s!/!_!g;
 
 			print $f <<EOF;
     <ClCompile Include="$fileNameWithPath">

src/tools/msvc/Mkvcbuild.pm

@@ -33,12 +33,10 @@ my $contrib_defines = { 'refint' => 'REFINT_VERBOSE' };
 my @contrib_uselibpq =
   ('dblink', 'oid2name', 'postgres_fdw', 'vacuumlo');
 my @contrib_uselibpgport = (
-	'chkpass',
 	'oid2name',
 	'pg_standby',
 	'vacuumlo');
 my @contrib_uselibpgcommon = (
-	'chkpass',
 	'oid2name',
 	'pg_standby',
 	'vacuumlo');

src/tools/msvc/VCBuildProject.pm

@@ -75,43 +75,48 @@ EOF
 		my $dir  = $1;
 		my $file = $2;
 
-  # Walk backwards down the directory stack and close any dirs we're done with
+		# Walk backwards down the directory stack and close any dirs
+		# we're done with.
 		while ($#dirstack >= 0)
 		{
-			if (join('\\', @dirstack) eq
-				substr($dir, 0, length(join('\\', @dirstack))))
+			if (join('/', @dirstack) eq
+				substr($dir, 0, length(join('/', @dirstack))))
 			{
-				last if (length($dir) == length(join('\\', @dirstack)));
+				last if (length($dir) == length(join('/', @dirstack)));
 				last
-				  if (substr($dir, length(join('\\', @dirstack)), 1) eq '\\');
+				  if (substr($dir, length(join('/', @dirstack)), 1) eq '/');
 			}
 			print $f ' ' x $#dirstack . "  </Filter>\n";
 			pop @dirstack;
 		}
 
 		# Now walk forwards and create whatever directories are needed
-		while (join('\\', @dirstack) ne $dir)
+		while (join('/', @dirstack) ne $dir)
 		{
-			my $left = substr($dir, length(join('\\', @dirstack)));
-			$left =~ s/^\\//;
-			my @pieces = split /\\/, $left;
+			my $left = substr($dir, length(join('/', @dirstack)));
+			$left =~ s/^\///;
+			my @pieces = split /\//, $left;
 			push @dirstack, $pieces[0];
 			print $f ' ' x $#dirstack
 			  . "  <Filter Name=\"$pieces[0]\" Filter=\"\">\n";
 		}
 
+		# VC builds do not like file paths with forward slashes.
+		my $fileNameWithPathFormatted = $fileNameWithPath;
+		$fileNameWithPathFormatted =~ s/\//\\/g;
+
 		print $f ' ' x $#dirstack
-		  . "   <File RelativePath=\"$fileNameWithPath\"";
+		  . "   <File RelativePath=\"$fileNameWithPathFormatted\"";
 		if ($fileNameWithPath =~ /\.y$/)
 		{
 			my $of = $fileNameWithPath;
 			$of =~ s/\.y$/.c/;
 			$of =~
-s{^src\\pl\\plpgsql\\src\\gram.c$}{src\\pl\\plpgsql\\src\\pl_gram.c};
+s{^src/pl/plpgsql/src/gram.c$}{src/pl/plpgsql/src/pl_gram.c};
 			print $f '>'
 			  . $self->GenerateCustomTool(
 				'Running bison on ' . $fileNameWithPath,
-				"perl src\\tools\\msvc\\pgbison.pl $fileNameWithPath", $of)
+				"perl src/tools/msvc/pgbison.pl $fileNameWithPath", $of)
 			  . '</File>' . "\n";
 		}
 		elsif ($fileNameWithPath =~ /\.l$/)
@@ -121,7 +126,7 @@ s{^src\\pl\\plpgsql\\src\\gram.c$}{src\\pl\\plpgsql\\src\\pl_gram.c};
 			print $f '>'
 			  . $self->GenerateCustomTool(
 				'Running flex on ' . $fileNameWithPath,
-				"perl src\\tools\\msvc\\pgflex.pl $fileNameWithPath", $of)
+				"perl src/tools/msvc/pgflex.pl $fileNameWithPath", $of)
 			  . '</File>' . "\n";
 		}
 		elsif (defined($uniquefiles{$file}))
@@ -129,7 +134,7 @@ s{^src\\pl\\plpgsql\\src\\gram.c$}{src\\pl\\plpgsql\\src\\pl_gram.c};
 
 			# File already exists, so fake a new name
 			my $obj = $dir;
-			$obj =~ s/\\/_/g;
+			$obj =~ s!/!_!g;
 			print $f
 "><FileConfiguration Name=\"Debug|$self->{platform}\"><Tool Name=\"VCCLCompilerTool\" ObjectFile=\".\\debug\\$self->{name}\\$obj"
 			  . "_$file.obj\" /></FileConfiguration><FileConfiguration Name=\"Release|$self->{platform}\"><Tool Name=\"VCCLCompilerTool\" ObjectFile=\".\\release\\$self->{name}\\$obj"