RFR(XS): 8212994: Links to Oracle websites should use "https:"

[Iris Clark]

Hi.

Please review changes to use "https" instead of "http" for links in the
generated JavaDoc API pages:

     8212994:  Links to Oracle websites should use "https:"
     bug:  https://bugs.openjdk.java.net/browse/JDK-8212994
     webrev:  https://cr.openjdk.java.net/~iris/8212994/webrev/

I did a full "make docs" build and verified that the old links are
no longer in the created image.

Thanks,
iris

$ pwd
/u/iris/se/full-jdk/build/images

$ find . -name "*.html" -print | xargs grep 
"http://www.oracle.com/technetwork/java/redist-137594.html"; | wc -l
0
$ find . -name "*.html" -print | xargs grep 
"https://www.oracle.com/technetwork/java/redist-137594.html"; | wc -l
20312

## link in banner and footer
$ find . -name "*.html" -print | xargs grep 
"http://www.oracle.com/technetwork/java/javase/terms/license/java12speclicense.html";
 | wc -l
0
$ find . -name "*.html" -print | xargs grep 
"https://www.oracle.com/technetwork/java/javase/terms/license/java12speclicense.html";
 | wc -l
40624

$ find . -name "*.html" -print | xargs grep 
"http://bugreport.java.com/bugreport/"; | wc -l
0
$ find . -name "*.html" -print | xargs grep 
"https://bugreport.java.com/bugreport/"; | wc -l
20312

$ find . -name "*.html" -print | xargs grep 
"http://www.oracle.com/pls/topic/lookup?ctx=javase12\&amp\;id=homepage"; | wc -l
0
$ find . -name "*.html" -print | xargs grep 
"https://www.oracle.com/pls/topic/lookup?ctx=javase12\&amp\;id=homepage"; | wc -l
20312