Tests: skip Location header escaping test on win32.

On win32, the backslash character ("\") is a path separator.
diff --git a/http_absolute_redirect.t b/http_absolute_redirect.t
index e344a22..59f2c37 100644
--- a/http_absolute_redirect.t
+++ b/http_absolute_redirect.t
@@ -167,6 +167,9 @@
 # %00-%1F, %7F-%FF, " ", """, "<", ">", "\", "^", "`", "{", "|", "}"
 # additionally, all characters in ESCAPE_URI: "?", "%", "#"
 
+SKIP: {
+skip 'win32', 1 if $^O eq 'MSWin32';
+
 TODO: {
 local $TODO = 'not yet' unless $t->has_version('1.21.1');
 
@@ -176,6 +179,8 @@
 
 }
 
+}
+
 ###############################################################################
 
 sub get {