Change from http to https for some URLs

.travis/Dockerfile

@@ -21,7 +21,7 @@ RUN apt-get -qq update && apt-get install -y --no-install-recommends \
         && rm -rf /var/lib/apt/lists/*
 
 # Travis has upgraded clang, from clang-3.8 to clang-7.0
-RUN printf "deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-7 main\ndeb-src http://apt.llvm.org/xenial/ llvm-toolchain-xenial-7 main\n" > /etc/apt/sources.list.d/llvm-toolchain.list && apt-key adv --fetch-keys http://apt.llvm.org/llvm-snapshot.gpg.key && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 1E9377A2BA9EF27F
+RUN printf "deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-7 main\ndeb-src https://apt.llvm.org/xenial/ llvm-toolchain-xenial-7 main\n" > /etc/apt/sources.list.d/llvm-toolchain.list && apt-key adv --fetch-keys https://apt.llvm.org/llvm-snapshot.gpg.key && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 1E9377A2BA9EF27F
 
 RUN apt-get -qq update && apt-get install -y --no-install-recommends \
                 clang-7 \

.travis/install_cuda.sh

@@ -8,7 +8,7 @@
 
 if [ -n "$CUDA" ]; then
     echo "Installing CUDA support"
-    travis_retry wget http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1404/x86_64/cuda-repo-ubuntu1404_${CUDA}_amd64.deb
+    travis_retry wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1404/x86_64/cuda-repo-ubuntu1404_${CUDA}_amd64.deb
     travis_retry sudo dpkg -i cuda-repo-ubuntu1404_${CUDA}_amd64.deb
     travis_retry sudo apt-get update -qq
     export CUDA_APT=${CUDA:0:3}

GPL-3.0.txt

@@ -1,7 +1,7 @@
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -645,7 +645,7 @@ the "copyright" line and a pointer to where the full notice is found.
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
@@ -664,11 +664,11 @@ might be different; for a GUI interface, you would use an "about box".
   You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
+<https://www.gnu.org/licenses/>.
 
   The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+<https://www.gnu.org/philosophy/why-not-lgpl.html>.

LICENSE.adoc

@@ -22,7 +22,7 @@ The license for ccache as a whole is as follows:
 -------------------------------------------------------------------------------
 
 The full license text can be found in GPL-3.0.txt and at
-http://www.gnu.org/licenses/gpl-3.0.html.
+https://www.gnu.org/licenses/gpl-3.0.html.
 
 
 Copyright and authors
@@ -56,7 +56,7 @@ src/third_party/getopt_long.[hc]
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 This implementation of `getopt_long()` was copied from
-http://www.postgresql.org[PostgreSQL] and has the following license text:
+https://www.postgresql.org[PostgreSQL] and has the following license text:
 
 -------------------------------------------------------------------------------
   Portions Copyright (c) 1987, 1993, 1994
@@ -132,7 +132,7 @@ following license:
 m4/feature_macros.m4
 ~~~~~~~~~~~~~~~~~~~~
 
-This Autoconf M4 snippet comes from http://www.python.org[Python] 2.6's
+This Autoconf M4 snippet comes from https://www.python.org[Python] 2.6's
 `configure.in` with the following license:
 
 -------------------------------------------------------------------------------

doc/INSTALL-from-release-archive.md

@@ -13,8 +13,8 @@ To build ccache from a
   `--with-libb2-from-internet` to the configure script, which will make the
   script download libb2 from the Internet and unpack it in the local source
   tree. ccache will then be linked statically to the locally built libb2.
-- [libzstd](http://www.zstd.net). If you don't have libzstd installed and can't
-  or don't want to install it on your system, you can pass
+- [libzstd](https://www.zstd.net). If you don't have libzstd installed and
+  can't or don't want to install it on your system, you can pass
   `--with-libzstd-from-internet` to the configure script, which will make the
   script download libzstd from the Internet and unpack it in the local source
   tree. ccache will then be linked statically to the locally built libzstd.

doc/INSTALL.md

@@ -8,26 +8,26 @@ To build ccache from a source repository, you need:
 
 - A C compiler (for instance GCC)
 - GNU Bourne Again SHell (bash) for tests.
-- [AsciiDoc](http://www.methods.co.nz/asciidoc/) to build the HTML
+- [AsciiDoc](https://www.methods.co.nz/asciidoc/) to build the HTML
   documentation.
 - [xsltproc](http://xmlsoft.org/XSLT/xsltproc2.html) to build the man page.
-- [Autoconf](http://www.gnu.org/software/autoconf/) to generate the configure
+- [Autoconf](https://www.gnu.org/software/autoconf/) to generate the configure
   script and related files.
-- [gperf](http://www.gnu.org/software/gperf/) to create lookup tables.
+- [gperf](https://www.gnu.org/software/gperf/) to create lookup tables.
 - [libb2](https://github.com/BLAKE2/libb2). If you don't have libb2 installed
   and can't or don't want to install it on your system, you can pass
   `--with-libb2-from-internet` to the configure script, which will make the
   script download libb2 from the Internet and unpack it in the local source
   tree. ccache will then be linked statically to the locally built libb2.
-- [libzstd](http://www.zstd.net). If you don't have libzstd installed and can't
-  or don't want to install it on your system, you can pass
+- [libzstd](https://www.zstd.net). If you don't have libzstd installed and
+  can't or don't want to install it on your system, you can pass
   `--with-libzstd-from-internet` to the configure script, which will make the
   script download libzstd from the Internet and unpack it in the local source
   tree. ccache will then be linked statically to the locally built libzstd.
 
 To debug and run the performance test suite you'll also need:
 
-- [Python](http://www.python.org)
+- [Python](https://www.python.org)
 
 
 Installation