doc: document NODE_TLS_REJECT_UNAUTHORIZED

This commit documents the NODE_TLS_REJECT_UNAUTHORIZED environment variable so that the world can know how potentially dangerous it is. PR-URL: #24289 Fixes: #24284 Reviewed-By: Vse Mozhet Byt <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]>
nodejs · Jan 12, 2019 · 1ca3c9d · 1ca3c9d
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diff --git a/doc/api/cli.md b/doc/api/cli.md
@@ -673,6 +673,12 @@ Path to the file used to store the persistent REPL history. The default path is
 `~/.node_repl_history`, which is overridden by this variable. Setting the value
 to an empty string (`''` or `' '`) disables persistent REPL history.
 
+### `NODE_TLS_REJECT_UNAUTHORIZED=value`
+
+If `value` equals `'0'`, certificate validation is disabled for TLS connections.
+This makes TLS, and HTTPS by extension, insecure. The use of this environment
+variable is strongly discouraged.
+
 ### `NODE_V8_COVERAGE=dir`
 
 When set, Node.js will begin outputting [V8 JavaScript code coverage][] to the