RFR: 8258420: Move URL configuration from Docs.gmk to conf dir

[Alan Bateman]

On Tue, 15 Dec 2020 17:50:46 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> In `Docs.gmk` there are some hard-coded links to online URL documentation and bug reporting locations. These should not reside in the make file per se, but instead move to the `make/conf` directory.

Okay.

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Marked as reviewed by alanb (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/1785