hg: code-tools/jtreg: move details of env vars to new appendix

[jonathan.gibbons at oracle.com]

Changeset: 80b395b11817
Author:    jjg
Date:      2020-07-07 15:23 -0700
URL:       https://hg.openjdk.java.net/code-tools/jtreg/rev/80b395b11817

move details of env vars to new appendix

! src/share/doc/javatest/regtest/tag-spec.html