doc: Use www.gitblit.com in link to full release notes

The release process generates a release on Github. The release notes
on Github link to the full release notes on the Gitblit website.
But since gitblit.com/ only has a simple redirect in the index.html to
the Github pages site, a direct link to the releasenotes on gitblit.com
will end up in the outdated pages on Jame's site.

Therefore use www.gitblit.com/ for the link, which we can control and
which leads to the Github pages directly.

Author: flaix

src/site/templates/ghreleasenotes.awk

@@ -6,7 +6,7 @@ BEGIN { on=0 ; skip=1 ; block=0 ; section=""}
 
 /r[0-9]+: *{/ { on=1 ; next }
 /^[[:blank:]]*}[[:blank:]]*$/ { if (on) {
-                                	print "[Full release notes on gitblit.com](http://gitblit.com/releases.html#" relId ")"
+                                	print "[Full release notes on gitblit.com](http://www.gitblit.com/releases.html#" relId ")"
                                 	exit 0
                                 }
                               }