MSVC: Revert most 9.5 changes to pre-9.5 vcregress.pl tests.

The reverted changes did not narrow the semantic gap between the MSVC
build system and the GNU make build system.  For targets old and new
that run multiple suites (contribcheck, modulescheck, tapcheck), restore
vcregress.pl to mimicking "make -k" rather than the "make -S" default.
Lack of "-k" would be more burdensome than lack of "-S".  Keep changes
reflecting contemporary changes to the GNU make build system, and keep
updates to Makefile parsing.  Keep the loss of --psqldir in "check" and
"ecpgcheck" targets; it had been a no-op when used alongside
--temp-install.  No log message mentioned any of the reverted changes.
Based on a germ by Michael Paquier.  Back-patch to 9.5.

src/tools/msvc/vcregress.pl

@@ -111,15 +111,12 @@ sub installcheck
 
 sub check
 {
-	chdir $startdir;
-
 	InstallTemp();
 	chdir "${topdir}/src/test/regress";
-
 	my @args = (
-		"${tmp_installdir}/bin/pg_regress",
+		"../../../$Config/pg_regress/pg_regress",
 		"--dlpath=.",
-		"--bindir=${tmp_installdir}/bin",
+		"--bindir=",
 		"--schedule=${schedule}_schedule",
 		"--encoding=SQL_ASCII",
 		"--no-locale",
@@ -139,11 +136,9 @@ sub ecpgcheck
 	exit $status if $status;
 	InstallTemp();
 	chdir "$topdir/src/interfaces/ecpg/test";
-
-	$ENV{PATH} = "${tmp_installdir}/bin;${tmp_installdir}/lib;$ENV{PATH}";
 	$schedule = "ecpg";
 	my @args = (
-		"${tmp_installdir}/bin/pg_regress_ecpg",
+		"../../../../$Config/pg_regress_ecpg/pg_regress_ecpg",
 		"--bindir=",
 		"--dbname=regress1,connectdb",
 		"--create-role=connectuser,connectdb",
@@ -159,14 +154,12 @@ sub ecpgcheck
 
 sub isolationcheck
 {
-	chdir $startdir;
-
-	InstallTemp();
-	chdir "${topdir}/src/test/isolation";
-
+	chdir "../isolation";
+	copy("../../../$Config/isolationtester/isolationtester.exe",
+		"../../../$Config/pg_isolation_regress");
 	my @args = (
-		"${tmp_installdir}/bin/pg_isolation_regress",
-		"--bindir=${tmp_installdir}/bin",
+		"../../../$Config/pg_isolation_regress/pg_isolation_regress",
+		"--bindir=../../../$Config/psql",
 		"--inputdir=.",
 		"--schedule=./isolation_schedule");
 	push(@args, $maxconn) if $maxconn;
@@ -180,8 +173,8 @@ sub tapcheck
 	InstallTemp();
 
 	my @args = ( "prove", "--verbose", "t/*.pl");
+	my $mstat = 0;
 
-	$ENV{PATH} = "$tmp_installdir/bin;$ENV{PATH}";
 	$ENV{PERL5LIB} = "$topdir/src/test/perl;$ENV{PERL5LIB}";
 	$ENV{PG_REGRESS} = "$topdir/$Config/pg_regress/pg_regress";
 
@@ -210,16 +203,14 @@ sub tapcheck
 		$ENV{TESTDIR} = "$dir";
 		system(@args);
 		my $status = $? >> 8;
-		exit $status if $status;
+		$mstat ||= $status;
 	}
+	exit $mstat if $mstat;
 }
 
 sub plcheck
 {
-	chdir $startdir;
-
-	InstallTemp();
-	chdir "${topdir}/src/pl";
+	chdir "../../pl";
 
 	foreach my $pl (glob("*"))
 	{
@@ -256,8 +247,8 @@ sub plcheck
 		  "============================================================\n";
 		print "Checking $lang\n";
 		my @args = (
-			"${tmp_installdir}/bin/pg_regress",
-			"--bindir=${tmp_installdir}/bin",
+			"../../../$Config/pg_regress/pg_regress",
+			"--bindir=../../../$Config/psql",
 			"--dbname=pl_regression", @lang_args, @tests);
 		system(@args);
 		my $status = $? >> 8;
@@ -272,7 +263,6 @@ sub subdircheck
 {
 	my $subdir = shift;
 	my $module = shift;
-	my $mstat  = 0;
 
 	if (   !-d "$module/sql"
 		|| !-d "$module/expected"
@@ -319,24 +309,19 @@ sub subdircheck
 	print "============================================================\n";
 	print "Checking $module\n";
 	my @args = (
-		"${tmp_installdir}/bin/pg_regress",
-		"--bindir=${tmp_installdir}/bin",
+		"$topdir/$Config/pg_regress/pg_regress",
+		"--bindir=${topdir}/${Config}/psql",
 		"--dbname=contrib_regression", @opts, @tests);
 	system(@args);
-	my $status = $? >> 8;
-	$mstat ||= $status;
 	chdir "..";
-
-	exit $mstat if $mstat;
 }
 
 sub contribcheck
 {
-	InstallTemp();
-	chdir "$topdir/contrib";
+	chdir "../../../contrib";
+	my $mstat = 0;
 	foreach my $module (glob("*"))
 	{
-
 		# these configuration-based exclusions must match Install.pm
 		next if ($module eq "uuid-ossp"     && !defined($config->{uuid}));
 		next if ($module eq "sslinfo"       && !defined($config->{openssl}));
@@ -347,26 +332,31 @@ sub contribcheck
 		next if ($module eq "sepgsql");
 
 		subdircheck("$topdir/contrib", $module);
+		my $status = $? >> 8;
+		$mstat ||= $status;
 	}
+	exit $mstat if $mstat;
 }
 
 sub modulescheck
 {
-	InstallTemp();
-	chdir "$topdir/src/test/modules";
+	chdir "../../../src/test/modules";
+	my $mstat = 0;
 	foreach my $module (glob("*"))
 	{
 		subdircheck("$topdir/src/test/modules", $module);
+		my $status = $? >> 8;
+		$mstat ||= $status;
 	}
+	exit $mstat if $mstat;
 }
 
-
 # Run "initdb", then reconfigure authentication.
 sub standard_initdb
 {
 	return (
-		system("${tmp_installdir}/bin/initdb", '-N') == 0 and system(
-			"${tmp_installdir}/bin/pg_regress", '--config-auth',
+		system('initdb', '-N') == 0 and system(
+			"$topdir/$Config/pg_regress/pg_regress", '--config-auth',
 			$ENV{PGDATA}) == 0);
 }
 
@@ -385,13 +375,14 @@ sub upgradecheck
 	$ENV{PGPORT} ||= 50432;
 	my $tmp_root = "$topdir/src/bin/pg_upgrade/tmp_check";
 	(mkdir $tmp_root || die $!) unless -d $tmp_root;
-
-	InstallTemp();
+	my $upg_tmp_install = "$tmp_root/install";    # unshared temp install
+	print "Setting up temp install\n\n";
+	Install($upg_tmp_install, "all", $config);
 
 	# Install does a chdir, so change back after that
 	chdir $cwd;
 	my ($bindir, $libdir, $oldsrc, $newsrc) =
-	  ("$tmp_installdir/bin", "$tmp_installdir/lib", $topdir, $topdir);
+	  ("$upg_tmp_install/bin", "$upg_tmp_install/lib", $topdir, $topdir);
 	$ENV{PATH} = "$bindir;$ENV{PATH}";
 	my $data = "$tmp_root/data";
 	$ENV{PGDATA} = "$data.old";
@@ -530,6 +521,7 @@ sub InstallTemp
 {
 	print "Setting up temp install\n\n";
 	Install("$tmp_installdir", "all", $config);
+	$ENV{PATH} = "$tmp_installdir/bin;$ENV{PATH}";
 }
 
 sub usage