Add missing repository setting docs in cheat sheet (#3230)

Author: strk

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -41,6 +41,10 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
 - `FORCE_PRIVATE`: Force every new repository to be private.
 - `MAX_CREATION_LIMIT`: Global maximum creation limit of repositories per user, `-1` means no limit.
 - `PULL_REQUEST_QUEUE_LENGTH`:exclamation:: Length of pull request patch test queue, make it as large as possible.
+- `MIRROR_QUEUE_LENGTH`: Patch test queue length, increase if pull request patch testing starts hanging. Defaults to 1000.
+- `PREFERRED_LICENSES`: Preferred Licenses to place at the top of the List. Name must match file name in conf/license or custom/conf/license. Defaults to 'Apache License 2.0,MIT License'
+- `DISABLE_HTTP_GIT`: Disable ability to interact with repositories by HTTP protocol.  Defaults to false
+- `USE_COMPAT_SSH_URI`: Force ssh:// clone url instead of scp-style uri when default SSH port is used. Defaults to false.
 
 ## UI (`ui`)