Fix problem where $resp->base would downcase its return value

This also reverts the parameter stripping behaviour that was introduced
in d6f0844.

Author: gisle

lib/HTTP/Response.pm

@@ -76,14 +76,11 @@ sub status_line
 sub base
 {
     my $self = shift;
-    my $base = $self->header('Content-Base')     ||  # used to be HTTP/1.1
-               $self->header('Content-Location') ||  # HTTP/1.1
-               $self->header('Base');                # HTTP/1.0
-    if ($base) {
-        # handle multiple values (take first one), drop parameters
-        require HTTP::Headers::Util;
-        $base = (HTTP::Headers::Util::split_header_words($base))[0]->[0];
-    }
+    my $base = (
+	$self->header('Content-Base'),        # used to be HTTP/1.1
+	$self->header('Content-Location'),    # HTTP/1.1
+	$self->header('Base'),                # HTTP/1.0
+    )[0];
     if ($base && $base =~ /^$URI::scheme_re:/o) {
 	# already absolute
 	return $HTTP::URI_CLASS->new($base);

t/base/response.t

@@ -94,9 +94,9 @@ for ($r->redirects) {
 }
 
 ok($r->base, $r->request->uri);
-$r->push_header("Content-Location", "/1/");
-ok($r->base, "http://www.sn.no/1/");
+$r->push_header("Content-Location", "/1/A/a");
+ok($r->base, "http://www.sn.no/1/A/a");
 $r->push_header("Content-Base", "/2/;a=/foo/bar");
-ok($r->base, "http://www.sn.no/2/"); # parameters stripped, -Base > -Location
+ok($r->base, "http://www.sn.no/2/;a=/foo/bar");
 $r->push_header("Content-Base", "/3/");
-ok($r->base, "http://www.sn.no/2/"); # first one of multiple prevails
+ok($r->base, "http://www.sn.no/2/;a=/foo/bar");