Add missing MYSQL_INITDB_SKIP_TZINFO

also make the boolean-like values more clear that a non-empty value is "true"
docker-library · May 28, 2020 · 5823260 · 5823260
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diff --git a/mariadb/content.md b/mariadb/content.md
@@ -102,11 +102,15 @@ Do note that there is no need to use this mechanism to create the root superuser
 
 ### `MYSQL_ALLOW_EMPTY_PASSWORD`
 
-This is an optional variable. Set to `yes` to allow the container to be started with a blank password for the root user. *NOTE*: Setting this variable to `yes` is not recommended unless you really know what you are doing, since this will leave your MariaDB instance completely unprotected, allowing anyone to gain complete superuser access.
+This is an optional variable. Set to a non-empty value, like `yes`, to allow the container to be started with a blank password for the root user. *NOTE*: Setting this variable to `yes` is not recommended unless you really know what you are doing, since this will leave your MariaDB instance completely unprotected, allowing anyone to gain complete superuser access.
 
 ### `MYSQL_RANDOM_ROOT_PASSWORD`
 
-This is an optional variable. Set to `yes` to generate a random initial password for the root user (using `pwgen`). The generated root password will be printed to stdout (`GENERATED ROOT PASSWORD: .....`).
+This is an optional variable. Set to a non-empty value, like `yes`, to generate a random initial password for the root user (using `pwgen`). The generated root password will be printed to stdout (`GENERATED ROOT PASSWORD: .....`).
+
+### `MYSQL_INITDB_SKIP_TZINFO`
+
+By default, the entrypoint script automatically loads the timezone data needed for the `CONVERT_TZ()` function. If it is not needed, any non-empty value disables timezone loading.
 
 ## Docker Secrets
 

diff --git a/mysql/content.md b/mysql/content.md
@@ -102,15 +102,19 @@ Do note that there is no need to use this mechanism to create the root superuser
 
 ### `MYSQL_ALLOW_EMPTY_PASSWORD`
 
-This is an optional variable. Set to `yes` to allow the container to be started with a blank password for the root user. *NOTE*: Setting this variable to `yes` is not recommended unless you really know what you are doing, since this will leave your MySQL instance completely unprotected, allowing anyone to gain complete superuser access.
+This is an optional variable. Set to a non-empty value, like `yes`, to allow the container to be started with a blank password for the root user. *NOTE*: Setting this variable to `yes` is not recommended unless you really know what you are doing, since this will leave your MySQL instance completely unprotected, allowing anyone to gain complete superuser access.
 
 ### `MYSQL_RANDOM_ROOT_PASSWORD`
 
-This is an optional variable. Set to `yes` to generate a random initial password for the root user (using `pwgen`). The generated root password will be printed to stdout (`GENERATED ROOT PASSWORD: .....`).
+This is an optional variable. Set to a non-empty value, like `yes`, to generate a random initial password for the root user (using `pwgen`). The generated root password will be printed to stdout (`GENERATED ROOT PASSWORD: .....`).
 
 ### `MYSQL_ONETIME_PASSWORD`
 
-Sets root (*not* the user specified in `MYSQL_USER`!) user as expired once init is complete, forcing a password change on first login. *NOTE*: This feature is supported on MySQL 5.6+ only. Using this option on MySQL 5.5 will throw an appropriate error during initialization.
+Sets root (*not* the user specified in `MYSQL_USER`!) user as expired once init is complete, forcing a password change on first login. Any non-empty value will activate this setting. *NOTE*: This feature is supported on MySQL 5.6+ only. Using this option on MySQL 5.5 will throw an appropriate error during initialization.
+
+### `MYSQL_INITDB_SKIP_TZINFO`
+
+By default, the entrypoint script automatically loads the timezone data needed for the `CONVERT_TZ()` function. If it is not needed, any non-empty value disables timezone loading.
 
 ## Docker Secrets