[MIRROR] Add warning about https to the external rsc config. (#631)

* Add warning about https to the external rsc config (#53367)

today in hostchat we discovered that most of the servers who tried to 
do cdn the .rsc, had unknown issues because they had used https:// 
urls. Byond can't into https.

like 5 servers had failed to get this to work because of that pitfall, 
so im gonna add a warning to the config.

* Add warning about https to the external rsc config.

Co-authored-by: Kyle Spier-Swenson <kyleshome@gmail.com>

config/resources.txt

@@ -2,6 +2,7 @@
 # Set this to the location of a .zip with the server's .rsc inside of it.
 # If you set this mutiple times, the server will rotate between the links.
 # To use this, the compile option PRELOAD_RSC must be set to 0 to keep byond from preloading resources
+# Resource urls can not be encrypted (https://), as they are downloaded by byond, not IE, and byond can't into encryption
 
 EXTERNAL_RSC_URLS http://tgstation13.download/byond/tgstationv2.zip
 
@@ -34,6 +35,7 @@ EXTERNAL_RSC_URLS http://tgstation13.download/byond/tgstationv2.zip
 
 # URL the folder from above can be accessed from.
 # for best results the webserver powering this should return a long cache validity time, as all assets sent via this transport use hash based urls
+# Encryption (https) is supported here, but linux clients will have issues if you require higher then tls 1.0. Windows clients down to windows 7 can handle tls 1.2 no issue.
 # if you want to test this locally, you simpily run the `localhost-asset-webroot-server.py` python3 script to host assets stored in `data/asset-store/` via http://localhost:58715/
 #ASSET_CDN_URL http://localhost:58715/