docs: update session providers and cookie names (#572)

Docs for https://github.com/go-gitea/gitea/pull/39504, which removed the `mysql`, `postgres`, `couchbase` and `memcache` session providers and renamed the default cookies to `gitea_session` and `gitea_remember`. The English cheat sheet copies the `app.example.ini` wording, the zh-cn and zh-tw cheat sheets get the same values.

Reviewed-on: https://gitea.com/gitea/docs/pulls/572
Reviewed-by: Lunny Xiao <[email protected]>
Reviewed-by: wxiaoguang <[email protected]>
Co-authored-by: silverwind <[email protected]>

docs/administration/config-cheat-sheet.md

@@ -586,8 +586,7 @@ And the following unique queues:
 - `SECRET_KEY`: **\<random at every install\>**: Global secret key. This key is VERY IMPORTANT, if you lost it, the data encrypted by it (like 2FA secret) can't be decrypted anymore.
 - `SECRET_KEY_URI`: **_empty_**: Instead of defining SECRET_KEY, this option can be used to use the key stored in a file (example value: `file:/etc/gitea/secret_key`). It shouldn't be lost like SECRET_KEY.
 - `LOGIN_REMEMBER_DAYS`: **31**: How long to remember that a user is logged in before requiring relogin (in days).
-- `COOKIE_REMEMBER_NAME`: **gitea\_incredible**: Name of cookie used to store authentication
-   information.
+- `COOKIE_REMEMBER_NAME`: **gitea\_remember**: Name of cookie used to store authentication information.
 - `REVERSE_PROXY_LOGOUT_REDIRECT`: **_empty_**: URL or relative path to redirect users to after logout when authentication is handled by a reverse proxy or SSO. For example: `/my-sso/logout?return=/my-sso/home`.
 - `REVERSE_PROXY_AUTHENTICATION_USER`: **X-WEBAUTH-USER**: Header name for reverse proxy
    authentication.
@@ -913,10 +912,10 @@ In-Reply-To =
 
 ## Session (`session`)
 
-- `PROVIDER`: **file**: Session engine provider \[memory, file, redis, db, mysql, couchbase, memcache, postgres\]. Setting `db` will reuse the configuration in `[database]`
+- `PROVIDER`: **file**: Either "memory", "file", "redis" or "db", default is "file". "db" will reuse the configuration in `[database]`
 - `PROVIDER_CONFIG`: **data/sessions**: For file, the root path; for db, empty (database config will be used); for others, the connection string. Relative paths will be made absolute against _`AppWorkPath`_. For the `redis` provider, if left empty it falls back to [redis/CONN_STR](#redis-redis) when that is set.
 - `COOKIE_SECURE`:**_empty_**: `true` or `false`. Enable this to force using HTTPS for all session access. If not set, it defaults to `true` if the ROOT_URL is an HTTPS URL.
-- `COOKIE_NAME`: **i\_like\_gitea**: The name of the cookie used for the session ID.
+- `COOKIE_NAME`: **gitea\_session**: Session cookie name
 - `GC_INTERVAL_TIME`: **86400**: GC interval in seconds.
 - `SESSION_LIFE_TIME`: **86400**: Session life time in seconds, default is 86400 (1 day)
 - `DOMAIN`: **_empty_**: Sets the cookie Domain