doc: use https links to avoid http redirect

Many sites these days unconditionally redirect http requests
to their https equivalents. Let's make our links https in
the first place to save the client a redirect.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-bisect-lk2009.txt

@@ -1349,10 +1349,10 @@ References
 
 - [[[1]]] http://www.nist.gov/public_affairs/releases/n02-10.htm['Software Errors Cost U.S. Economy $59.5 Billion Annually'. Nist News Release.]
 - [[[2]]] http://java.sun.com/docs/codeconv/html/CodeConventions.doc.html#16712['Code Conventions for the Java Programming Language'. Sun Microsystems.]
-- [[[3]]] http://en.wikipedia.org/wiki/Software_maintenance['Software maintenance'. Wikipedia.]
+- [[[3]]] https://en.wikipedia.org/wiki/Software_maintenance['Software maintenance'. Wikipedia.]
 - [[[4]]] http://article.gmane.org/gmane.comp.version-control.git/45195/[Junio C Hamano. 'Automated bisect success story'. Gmane.]
-- [[[5]]] http://lwn.net/Articles/317154/[Christian Couder. 'Fully automated bisecting with "git bisect run"'. LWN.net.]
-- [[[6]]] http://lwn.net/Articles/277872/[Jonathan Corbet. 'Bisection divides users and developers'. LWN.net.]
+- [[[5]]] https://lwn.net/Articles/317154/[Christian Couder. 'Fully automated bisecting with "git bisect run"'. LWN.net.]
+- [[[6]]] https://lwn.net/Articles/277872/[Jonathan Corbet. 'Bisection divides users and developers'. LWN.net.]
 - [[[7]]] http://article.gmane.org/gmane.linux.scsi/36652/[Ingo Molnar. 'Re: BUG 2.6.23-rc3 can't see sd partitions on Alpha'. Gmane.]
-- [[[8]]] http://www.kernel.org/pub/software/scm/git/docs/git-bisect.html[Junio C Hamano and the git-list. 'git-bisect(1) Manual Page'. Linux Kernel Archives.]
-- [[[9]]] http://github.com/Ealdwulf/bbchop[Ealdwulf. 'bbchop'. GitHub.]
+- [[[8]]] https://www.kernel.org/pub/software/scm/git/docs/git-bisect.html[Junio C Hamano and the git-list. 'git-bisect(1) Manual Page'. Linux Kernel Archives.]
+- [[[9]]] https://github.com/Ealdwulf/bbchop[Ealdwulf. 'bbchop'. GitHub.]

Documentation/gitweb.conf.txt

@@ -368,8 +368,8 @@ $logo_url::
 $logo_label::
 	URI and label (title) for the Git logo link (or your site logo,
 	if you chose to use different logo image). By default, these both
-	refer to Git homepage, http://git-scm.com[]; in the past, they pointed
-	to Git documentation at http://www.kernel.org[].
+	refer to Git homepage, https://git-scm.com[]; in the past, they pointed
+	to Git documentation at https://www.kernel.org[].
 
 
 Changing gitweb's look

Documentation/howto/rebuild-from-update-hook.txt

@@ -4,13 +4,13 @@ From: Junio C Hamano <gitster@pobox.com>
 Date: Fri, 26 Aug 2005 18:19:10 -0700
 Abstract: In this how-to article, JC talks about how he
  uses the post-update hook to automate Git documentation page
- shown at http://www.kernel.org/pub/software/scm/git/docs/.
+ shown at https://www.kernel.org/pub/software/scm/git/docs/.
 Content-type: text/asciidoc
 
 How to rebuild from update hook
 ===============================
 
-The pages under http://www.kernel.org/pub/software/scm/git/docs/
+The pages under https://www.kernel.org/pub/software/scm/git/docs/
 are built from Documentation/ directory of the git.git project
 and needed to be kept up-to-date.  The www.kernel.org/ servers
 are mirrored and I was told that the origin of the mirror is on