8317357: Update links in building.md to use https rather than http

Reviewed-by: iris, erikj, jwaters

doc/building.md

@@ -40,7 +40,7 @@ reasonably powerful hardware.
 
 If you just want to use the JDK and not build it yourself, this document is not
 for you. See for instance [OpenJDK installation](
-http://openjdk.org/install) for some methods of installing a prebuilt
+https://openjdk.org/install) for some methods of installing a prebuilt
 JDK.
 
 ## Getting the Source Code
@@ -205,7 +205,7 @@ Note: The Windows 32-bit x86 port is deprecated and may be removed in a future r
 
 #### Cygwin
 
-A functioning [Cygwin](http://www.cygwin.com/) environment is required for
+A functioning [Cygwin](https://www.cygwin.com/) environment is required for
 building the JDK on Windows. If you have a 64-bit OS, we strongly recommend
 using the 64-bit version of Cygwin.
 
@@ -433,8 +433,8 @@ If the boot JDK is not automatically detected, or the wrong JDK is picked, use
 ### Getting JDK binaries
 
 JDK binaries for Linux, Windows and macOS can be downloaded from
-[jdk.java.net](http://jdk.java.net). An alternative is to download the
-[Oracle JDK](http://www.oracle.com/technetwork/java/javase/downloads). Another
+[jdk.java.net](https://jdk.java.net). An alternative is to download the
+[Oracle JDK](https://www.oracle.com/technetwork/java/javase/downloads). Another
 is the [Adopt OpenJDK Project](https://adoptopenjdk.net/), which publishes
 experimental prebuilt binaries for various platforms.
 
@@ -460,7 +460,7 @@ and the lib directory separately.
 
 ### FreeType
 
-FreeType2 from [The FreeType Project](http://www.freetype.org/) is not required
+FreeType2 from [The FreeType Project](https://www.freetype.org/) is not required
 on any platform. The exception is on Unix-based platforms when configuring such
 that the build artifacts will reference a system installed library,
 rather than bundling the JDK's own copy.
@@ -477,7 +477,7 @@ if `configure` does not automatically locate the platform FreeType files.
 
 ### Fontconfig
 
-Fontconfig from [freedesktop.org Fontconfig](http://fontconfig.org) is required
+Fontconfig from [freedesktop.org Fontconfig](https://fontconfig.org) is required
 on all platforms except Windows and macOS.
 
   * To install on an apt-based Linux, try running `sudo apt-get install
@@ -490,7 +490,7 @@ if `configure` does not automatically locate the platform Fontconfig files.
 
 ### CUPS
 
-CUPS, [Common UNIX Printing System](http://www.cups.org) header files are
+CUPS, [Common UNIX Printing System](https://www.cups.org) header files are
 required on all platforms, except Windows. Often these files are provided by
 your operating system.
 
@@ -505,7 +505,7 @@ files.
 
 ### X11
 
-Certain [X11](http://www.x.org/) libraries and include files are required on
+Certain [X11](https://www.x.org/) libraries and include files are required on
 Linux.
 
   * To install on an apt-based Linux, try running `sudo apt-get install
@@ -534,7 +534,7 @@ files.
 ### libffi
 
 libffi, the [Portable Foreign Function Interface Library](
-http://sourceware.org/libffi) is required when building the Zero version of
+https://sourceware.org/libffi) is required when building the Zero version of
 Hotspot.
 
   * To install on an apt-based Linux, try running `sudo apt-get install
@@ -550,7 +550,7 @@ files.
 
 ### Autoconf
 
-The JDK requires [Autoconf](http://www.gnu.org/software/autoconf) on all
+The JDK requires [Autoconf](https://www.gnu.org/software/autoconf) on all
 platforms. At least version 2.69 is required.
 
   * To install on an apt-based Linux, try running `sudo apt-get install
@@ -571,7 +571,7 @@ AUTOCONF=<path to autoconf> configure ...
 
 ### GNU Make
 
-The JDK requires [GNU Make](http://www.gnu.org/software/make). No other flavors
+The JDK requires [GNU Make](https://www.gnu.org/software/make). No other flavors
 of make are supported.
 
 At least version 3.81 of GNU Make must be used. For distributions supporting
@@ -593,7 +593,7 @@ configure variable, e.g. `configure MAKE=/opt/gnu/make`.
 
 ### GNU Bash
 
-The JDK requires [GNU Bash](http://www.gnu.org/software/bash). No other shells
+The JDK requires [GNU Bash](https://www.gnu.org/software/bash). No other shells
 are supported.
 
 At least version 3.2 of GNU Bash must be used.
@@ -870,7 +870,7 @@ Suggestions for Advanced Users](#hints-and-suggestions-for-advanced-users) and
 
 ## Running Tests
 
-Most of the JDK tests are using the [JTReg](http://openjdk.org/jtreg)
+Most of the JDK tests are using the [JTReg](https://openjdk.org/jtreg)
 test framework. Make sure that your configuration knows where to find your
 installation of JTReg. If this is not picked up automatically, use the
 `--with-jtreg=<path to jtreg home>` option to point to the JTReg framework.
@@ -1192,7 +1192,7 @@ For example, cross-compiling to AArch64 from x86_64 could be done like this:
       --resolve-deps \
       buster \
       ~/sysroot-arm64 \
-      http://httpredir.debian.org/debian/
+      https://httpredir.debian.org/debian/
     # If the target architecture is `riscv64`,
     # the path should be `debian-ports` instead of `debian`.
     ```
@@ -1410,7 +1410,7 @@ You can experiment by disabling precompiled headers using
 
 ### Icecc / icecream
 
-[icecc/icecream](http://github.com/icecc/icecream) is a simple way to setup a
+[icecc/icecream](https://github.com/icecc/icecream) is a simple way to setup a
 distributed compiler network. If you have multiple machines available for
 building the JDK, you can drastically cut individual build times by utilizing
 it.
@@ -2046,7 +2046,7 @@ To analyze build performance, run with `LOG=trace` and check `$BUILD/build-trace
 Use `JOBS=1` to avoid parallelism.
 
 Please check that you adhere to the [Code Conventions for the Build System](
-http://openjdk.org/groups/build/doc/code-conventions.html) before
+https://openjdk.org/groups/build/doc/code-conventions.html) before
 submitting patches.
 
 ## Contributing to the JDK