_ENVIRONMENT.md. Windows does case insensitive env variables
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| @@ -3,7 +3,8 @@ | |
| # ENVIRONMENT | |
| The environment variables can be specified in lower case or upper case. The | |
| lower case version has precedence. `http_proxy` is an exception as it is only | |
| - | available in lower case. |
| + | available in lower case. (Note that some systems, like Windows, do not |
| + | differentiate between environment variables using different case.) |
| Using an environment variable to set the proxy has the same effect as using | |
| the --proxy option. | |
| @@ -32,8 +32,8 @@ uses the **ftp_proxy** variable. | |
| These proxy variables are also checked for in their uppercase versions, except | |
| the **http_proxy** one which is only used lowercase. Note also that some | |
| - | systems actually have a case insensitive handling of environment variables and |
| - | then of course **HTTP_PROXY** still works. |
| + | systems (like Windows) have a case insensitive handling of environment |
| + | variables and then of course **HTTP_PROXY** still works. |
| An exception exists for the WebSocket **ws** and **wss** URL schemes, where | |
| libcurl first checks **ws_proxy** or **wss_proxy** but if they are not set, it | |