[meta] Document DXVK_CONFIG in readme

README.md

@@ -141,8 +141,9 @@ The following environment variables can be used for **debugging** purposes.
 - `VK_INSTANCE_LAYERS=VK_LAYER_KHRONOS_validation` Enables Vulkan debug layers. Highly recommended for troubleshooting rendering issues and driver crashes. Requires the Vulkan SDK to be installed on the host system.
 - `DXVK_LOG_LEVEL=none|error|warn|info|debug` Controls message logging.
 - `DXVK_LOG_PATH=/some/directory` Changes path where log files are stored. Set to `none` to disable log file creation entirely, without disabling logging.
-- `DXVK_CONFIG_FILE=/xxx/dxvk.conf` Sets path to the configuration file.
 - `DXVK_DEBUG=markers|validation` Enables use of the `VK_EXT_debug_utils` extension for translating performance event markers, or to enable Vulkan validation, respecticely.
+- `DXVK_CONFIG_FILE=/xxx/dxvk.conf` Sets path to the configuration file.
+- `DXVK_CONFIG="dxgi.hideAmdGpu = True; dxgi.syncInterval = 0"` Can be used to set config variables through the environment instead of a configuration file using the same syntax. `;` is used as a seperator.
 
 ## Troubleshooting
 DXVK requires threading support from your mingw-w64 build environment. If you