Checking in changes prior to tagging of version 0.44.

Changelog diff is:

diff --git a/Changes b/Changes
index 40312cb..95bc0fe 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,7 @@
 Revision history for Perl extension CGI::Header.

+0.44  Apr 9th, 2013
+
   [INCOMPATIBLE CHANGES]

     - Revise new() entirely