* Renames vars on pdas and removes ntnet_relays glob (#79595)
## About The Pull Request
- replaces the ntnet_relays global list with ``get_machines_by_type``
- renames ``transfer_access`` var on PDA to ``download_access`` &
``required_access`` to ``run_access`` to better describe what they do,
because on more than one ocassion I've confused myself with the two
terms and ended up doing something unintentional (see:
https://github.com/tgstation/tgstation/pull/74269)
## Why It's Good For The Game
Kills a useless global list and makes pda code a little less confusing.
## Changelog
Nothing player-facing.
* Renames vars on pdas and removes ntnet_relays glob
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Co-authored-by: John Willard <53777086+JohnFulpWillard@users.noreply.github.com>
* Document datum, area,atom and some of the mob code
* Update
* Documented mob_helpers poorly
* Brief treatise on mob movement iself
* sdfasdf
* Add title to treaties
* Move readme file for say
* more say stuff for mobs
* Document login and status procs
* Add some goddan links like a boss
* Document some atom vars
Changes documentation to an md
Changes some santize on inputs to reject_bad_text
Adds handling for the downloader to abort the download if the program is killed
