docs/manual: update links to buildroot.org from http to https

Many links pointing to buildroot.org are still prefixed with HTTP.
Update those to HTTPS.

Signed-off-by: Alexis Lothoré <alexis.lothore@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

docs/manual/adding-packages-tips.adoc

@@ -85,7 +85,7 @@ under various conditions: does it build for all architectures? Does it
 build with the different C libraries? Does it need threads, NPTL? And
 so on...
 
-Buildroot runs http://autobuild.buildroot.org/[autobuilders] which
+Buildroot runs https://autobuild.buildroot.org/[autobuilders] which
 continuously test random configurations. However, these only build the
 `master` branch of the git tree, and your new fancy package is not yet
 there.

docs/manual/contribute.adoc

@@ -40,8 +40,8 @@ with a random selection of packages. With the large commit activity on
 Buildroot, these autobuilders are a great help in detecting problems
 very early after commit.
 
-All build results are available at http://autobuild.buildroot.org[],
-statistics are at http://autobuild.buildroot.org/stats.php[]. Every day,
+All build results are available at https://autobuild.buildroot.org[],
+statistics are at https://autobuild.buildroot.org/stats.php[]. Every day,
 an overview of all failed packages is sent to the mailing list.
 
 Detecting problems is great, but obviously these problems have to be
@@ -58,7 +58,7 @@ basically two things that can be done:
   these steps:
   . Check if you can reproduce the problem by building with the same
     configuration. You can do this manually, or use the
-    http://git.buildroot.org/buildroot-test/tree/utils/br-reproduce-build[br-reproduce-build]
+    https://git.buildroot.org/buildroot-test/tree/utils/br-reproduce-build[br-reproduce-build]
     script that will automatically clone a Buildroot git repository,
     checkout the correct revision, download and set the right
     configuration, and start the build.
@@ -73,7 +73,7 @@ basically two things that can be done:
     In the commit message of a patch fixing an autobuild failure, add a
     reference to the build result directory, as follows:
 ----
-Fixes: http://autobuild.buildroot.org/results/51000a9d4656afe9e0ea6f07b9f8ed374c2e4069
+Fixes: https://autobuild.buildroot.org/results/51000a9d4656afe9e0ea6f07b9f8ed374c2e4069
 ----
 
 === Reviewing and testing patches

docs/manual/getting.adoc

@@ -8,7 +8,7 @@ Buildroot releases are made every 3 months, in February, May, August and
 November. Release numbers are in the format YYYY.MM, so for example
 2013.02, 2014.08.
 
-Release tarballs are available at http://buildroot.org/downloads/[].
+Release tarballs are available at https://buildroot.org/downloads/[].
 
 For your convenience, a https://www.vagrantup.com/[Vagrantfile] is
 available in `support/misc/Vagrantfile` in the Buildroot source tree
@@ -32,5 +32,5 @@ vagrant up
 
 If you want to follow development, you can use the daily snapshots or
 make a clone of the Git repository. Refer to the
-http://buildroot.org/download.html[Download page] of the Buildroot website
+https://buildroot.org/download.html[Download page] of the Buildroot website
 for more details.

docs/manual/manual.adoc

@@ -9,7 +9,7 @@ Buildroot {sys:echo $BR2_VERSION} manual generated on {localdate}
 
 The Buildroot manual is written by the Buildroot developers.
 It is licensed under the GNU General Public License, version 2. Refer to the
-http://git.buildroot.org/buildroot/tree/COPYING?id={sys:git rev-parse HEAD}[COPYING]
+https://git.buildroot.org/buildroot/tree/COPYING?id={sys:git rev-parse HEAD}[COPYING]
 file in the Buildroot sources for the full text of this license.
 
 Copyright (C) The Buildroot developers <buildroot@buildroot.org>

docs/manual/resources.adoc

@@ -17,12 +17,12 @@ main method of interaction for Buildroot users and developers.
 +
 Only subscribers to the Buildroot mailing list are allowed to post to
 this list. You can subscribe via the
-http://lists.buildroot.org/mailman/listinfo/buildroot[mailing list info
+https://lists.buildroot.org/mailman/listinfo/buildroot[mailing list info
 page].
 +
 Mails that are sent to the mailing list are also available in the
 mailing list archives, available through
-http://lists.buildroot.org/pipermail/buildroot[Mailman] or at
+https://lists.buildroot.org/pipermail/buildroot[Mailman] or at
 https://lore.kernel.org/buildroot/[lore.kernel.org].
 
 IRC::