We have too many docs to list these out now,
even in 3.x this was a bit of a stopgap solution.
Point to a centrally managed URL on silverstripe.org
instead, where we can update the list of "core modules" regularly
without breaking URLs in the docs etc
Note that these URLs are also used internally by the
Open Sourcerers team.
API Remove Director::$test_servers / $dev_servers
API Remove MODULES_PATH / MODULES_DIR constants
ENHANCEMENT Injector backtick syntax now supports environment variables as well as constants
Fixes#6588
It was getting a bit lost halfway down the contributing/code instructions,
in between the detailed git instructions.
Also reordered the docs TOC for that folder by renaming the files.