Tests: more perl tests.

test/perl/header_equal_names/psgi.pl

@@ -0,0 +1,9 @@
+my $app = sub {
+    my ($environ) = @_;
+
+    return ['200', [
+        'Content-Length' => 0,
+        'Set-Cookie' => 'tc=one,two,three',
+        'Set-Cookie' => 'tc=four,five,six'
+    ], []];
+};

test/perl/input_read_parts/psgi.pl

@@ -0,0 +1,10 @@
+my $app = sub {
+    my ($environ) = @_;
+
+    $len_1 = $environ->{'psgi.input'}->read(my $body_1, 4);
+    $len_2 = $environ->{'psgi.input'}->read(my $body_2, 4);
+    $len_3 = $environ->{'psgi.input'}->read(my $body_3, 2);
+
+    return ['200', ['Content-Length' => $len_1 + $len_2 + $len_3],
+        [$body_1 . $body_2 . $body_3]];
+};