These are broken links:

• https://hg.openjdk.java.net/openjfx/9-dev/rt/rev/70f6fa01a32c
• https://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/0a0a0986400e#l2.19
• https://hg.openjdk.java.net/jdk8/jdk8/jdk/rev/9078c34437ab

As reported in https://www.mail-archive.com/[email protected]/msg00008.html:

The sources on hg.openjdk.org are severely outdated and the server is only kept around for reference. We have migrated all relevant repositories to GitHub and that is now our preferred hosting solution.

So I've tried to find the same commits in GitHub OpenJDK repositories.
In order to achieve it, I've searched for the OpenJDK's bugs the commits referenced in the broken links above were fixing and, using the bug ID, I've searched the related commits in OpenJDK's repositories and replaced the broken links with the working ones:

• https://hg.openjdk.java.net/openjfx/9-dev/rt/rev/70f6fa01a32c => JDK-8154203 => d647521fa83f0cebe9532642ee97ffc4356c8bb3
• https://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/0a0a0986400e#l2.19 => JDK-8054494 => 083d9a2b6145a422bad64423675660c94bb32958
• https://hg.openjdk.java.net/jdk8/jdk8/jdk/rev/9078c34437ab => JDK-8006182 => ec9e303630158405d0faaabb74f466f0a376c1fc

I've also took the chance to add, for each new link, the OpenJDK Bug it refers to.

CC @neugens