Oracle Unilinks are [301 Moved Permanently] to https://docs.oracle.com

In the generated docs bundle, all links of the form

https://www.oracle.com/pls/topic/lookup?ctx=javase

are now permanently redirected to docs.oracle.com.

The links that need to be updated are in the following lines in the makefiles:

$ grep -r oracle.com/pls open/make
open/make/Docs.gmk:JAVADOC_BASE_URL := https://www.oracle.com/pls/topic/lookup?ctx=javase$(VERSION_NUMBER)&id=homepage
open/make/jdk/src/classes/build/tools/taglet/ExtLink.java: * Please see <a href="https://www.oracle.com/pls/topic/lookup?ctx=javase10&id=Borealis">a spectacular</a> sight.
open/make/jdk/src/classes/build/tools/taglet/ExtLink.java: static final String URL = "https://www.oracle.com/pls/topic/lookup?ctx=javase" +