Update README.md

Author: DO1JLR

README.md

@@ -127,7 +127,7 @@ Either you define exactly which release you install. Or you use the option ``lat
 | `gitea_show_user_email` | `false` | Do you want to display email addresses ? (true/false) |
 | `gitea_theme_default` | `auto` | Default theme |
 | `gitea_themes` | `auto,gitea,arc-green` | List of enabled themes |
-| `gitea_ui_extra_config` | `''` | you can use this variable to pass additional config parameters in the `[ui]` section of the config. |
+| `gitea_ui_extra_config` | | you can use this variable to pass additional config parameters in the `[ui]` section of the config. |
 
 ### UI - Meta ([ui.meta](https://docs.gitea.io/en-us/config-cheat-sheet/#ui---metadata-uimeta))
 | variable name | default value | description |
@@ -177,7 +177,7 @@ Either you define exactly which release you install. Or you use the option ``lat
 | `gitea_db_ssl` | `disable` | Configure SSL only if your database type supports it. Have a look into the [config-cheat-sheet](https://docs.gitea.io/en-us/config-cheat-sheet/#database-database) for more detailed information |
 | `gitea_db_path` | `{{ gitea_home }}/data/gitea.db` | DB path, if you use `sqlite3`. |
 | `gitea_db_log_sql` | `false` | Log the executed SQL. |
-| `gitea_database_extra_config` | `''` | you can use this variable to pass additional config parameters in the `[database]` section of the config. |
+| `gitea_database_extra_config` | | you can use this variable to pass additional config parameters in the `[database]` section of the config. |
 
 ### Indexer ([indexer](https://docs.gitea.io/en-us/config-cheat-sheet/#indexer-indexer))
 | variable name | default value | description |
@@ -193,12 +193,12 @@ Either you define exactly which release you install. Or you use the option ``lat
 ### Security ([security](https://docs.gitea.io/en-us/config-cheat-sheet/#security-security))
 | variable name | default value | description |
 | ------------- | ------------- | ----------- |
-| `gitea_secret_key` | `''` | Global secret key. Will be autogenerated if not defined. Should be unique. |
+| `gitea_secret_key` | | Global secret key. Will be autogenerated if not defined. Should be unique. |
 | `gitea_disable_git_hooks` | `true` | Set to false to enable users with git hook privilege to create custom git hooks. Can be dangerous. |
 | `gitea_disable_webhooks`  | `false` | Set to true to disable webhooks feature. |
-| `gitea_internal_token` | `''` | Internal API token. Will be autogenerated if not defined. Should be unique. |
+| `gitea_internal_token` | | Internal API token. Will be autogenerated if not defined. Should be unique. |
 | `gitea_password_check_pwn` | `false` | Check [HaveIBeenPwned](https://haveibeenpwned.com/Passwords) to see if a password has been exposed. |
-| `gitea_security_extra_config` | `''` | you can use this variable to pass additional config parameters in the `[security]` section of the config. |
+| `gitea_security_extra_config` | | you can use this variable to pass additional config parameters in the `[security]` section of the config. |
 
 ### Service ([service](https://docs.gitea.io/en-us/config-cheat-sheet/#service-service))
 | variable name | default value | description |
@@ -212,7 +212,7 @@ Either you define exactly which release you install. Or you use the option ``lat
 | `gitea_only_allow_external_registration` | `false` | Set to true to force registration only using third-party services (true/false) |
 | `gitea_enable_notify_mail` | `false` | Enable this to send e-mail to watchers of a repository when something happens, like creating issues (true/false) |
 | `gitea_auto_watch_new_repos` | `true` | Enable this to let all organisation users watch new repos when they are created (true/false) |
-| `gitea_service_extra_config` | `''` | you can use this variable to pass additional config parameters in the `[service]` section of the config. |
+| `gitea_service_extra_config` | | you can use this variable to pass additional config parameters in the `[service]` section of the config. |
 
 ### Mailer ([mailer](https://docs.gitea.io/en-us/config-cheat-sheet/#mailer-mailer))
 | variable name | default value | description |
@@ -237,18 +237,18 @@ Either you define exactly which release you install. Or you use the option ``lat
 | variable name | default value | description |
 | ------------- | ------------- | ----------- |
 | `gitea_session_provider` | `file` | Session engine provider |
-| `gitea_session_extra_config` | `''` | you can use this variable to pass additional config parameters in the `[session]` section of the config. |
+| `gitea_session_extra_config` | | you can use this variable to pass additional config parameters in the `[session]` section of the config. |
 
 ### Picture ([picture](https://docs.gitea.io/en-us/config-cheat-sheet/#picture-picture))
 | variable name | default value | description |
 | ------------- | ------------- | ----------- |
-| `gitea_picture_extra_config` | `''` | you can use this variable to pass additional config parameters in the `[picture]` section of the config. |
+| `gitea_picture_extra_config` | | you can use this variable to pass additional config parameters in the `[picture]` section of the config. |
 
 ### Issue and pull request attachments ([attachment](https://docs.gitea.io/en-us/config-cheat-sheet/#issue-and-pull-request-attachments-attachment))
 | variable name | default value | description |
 | ------------- | ------------- | ----------- |
 | `attachment_enabled` | `true` | Whether issue and pull request attachments are enabled. |
-| `gitea_attachment_extra_config` | `''` | you can use this variable to pass additional config parameters in the `[attachment]` section of the config. |
+| `gitea_attachment_extra_config` | | you can use this variable to pass additional config parameters in the `[attachment]` section of the config. |
 
 ### Log ([log](https://docs.gitea.io/en-us/config-cheat-sheet/#log-log))
 | variable name | default value | description |
@@ -304,7 +304,7 @@ Either you define exactly which release you install. Or you use the option ``lat
 ### additional gitea config
 | variable name | default value | description |
 | ------------- | ------------- | ----------- |
-| `gitea_extra_config` | `''` | Additional gitea configuration. Have a look at the [config-cheat-sheet](https://docs.gitea.io/en-us/config-cheat-sheet/) before using it! |
+| `gitea_extra_config` | | Additional gitea configuration. Have a look at the [config-cheat-sheet](https://docs.gitea.io/en-us/config-cheat-sheet/) before using it! |
 
 ### Fail2Ban configuration