use https://libgd.org

README.md

@@ -28,7 +28,7 @@ Support available in [![Chat](https://badges.gitter.im/libgd/libgd.svg)](https:/
 
 ## Downloads/etc...
 
-Please visit our [homepage](http://www.libgd.org/) for more details.
+Please visit our [homepage](https://www.libgd.org/) for more details.
 
 ## Supported Image Formats
 

docs/README.TESTING

@@ -34,7 +34,7 @@ $ ctest .
 I will certainly add a nice CMake option to give prefix later.
 
 What to do if tests fail on your platform and you use the last GD release?
-either from your favorite distributions or from http://www.libgd.org or git?
+either from your favorite distributions or from https://www.libgd.org or git?
 
 If you use a packaged version of the GD Library (installed from RPM, deb or
 ports, gentoo packages or any other packages format or distribution), please try

src/gd_jpeg.c

@@ -1,6 +1,6 @@
 /*
  * gd_jpeg.c: Read and write JPEG (JFIF) format image files using the
- * gd graphics library (http://www.libgd.org).
+ * gd graphics library (https://www.libgd.org).
  *
  * This software is based in part on the work of the Independent JPEG
  * Group.  For more information on the IJG JPEG software (and JPEG

windows/libgd.rc

@@ -43,7 +43,7 @@ BEGIN
             VALUE "PrivateBuild", "\0"
             VALUE "ProductName", "LIBGD dynamic link library" "\0"
             VALUE "SpecialBuild", "win32" "\0"
-			VALUE "URL", "http://www.libgd.org/"
+			VALUE "URL", "https://www.libgd.org/"
         END
     END
     BLOCK "VarFileInfo"