doc: fix markdown links

Fixes: #5322
PR-URL: #5641
Reviewed-By: Robert Lindstädt <robert.lindstaedt@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Roman Reiss <me@silverwind.io>

doc/api/crypto.markdown

@@ -831,7 +831,7 @@ recent OpenSSL releases, `openssl list-cipher-algorithms` will display the
 available cipher algorithms.
 
 The `password` is used to derive the cipher key and initialization vector (IV).
-The value must be either a `'binary'` encoded string or a [`Buffer`[].
+The value must be either a `'binary'` encoded string or a [`Buffer`][].
 
 The implementation of `crypto.createCipher()` derives keys using the OpenSSL
 function [`EVP_BytesToKey`][] with the digest algorithm set to MD5, one

doc/api/errors.markdown

@@ -520,6 +520,8 @@ found [here][online].
   encountered by [`http`][] or [`net`][] -- often a sign that a `socket.end()`
   was not properly called.
 
+[`domain`]: domain.html
+[`EvalError`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/EvalError
 [`Error`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error
 [`fs.readdir`]: fs.html#fs_fs_readdir_path_callback
 [`fs.readFileSync`]: fs.html#fs_fs_readfilesync_file_options
@@ -540,6 +542,7 @@ found [here][online].
 [V8's stack trace API]: https://github.com/v8/v8/wiki/Stack-Trace-API
 [vm]: vm.html
 [`SyntaxError`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SyntaxError
+[`RangeError`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RangeError
 [`ReferenceError`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ReferenceError
 [`TypeError`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError
-[`domain`]: domain.html
+[`URIError`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/URIError

doc/api/http.markdown

@@ -1225,7 +1225,7 @@ There are a few special headers that should be noted.
 [`'listening'`]: net.html#net_event_listening
 [`'response'`]: #http_event_response
 [`Agent`]: #http_class_http_agent
-[`agent.createConnection`]: #http_agent_createconnection
+[`agent.createConnection()`]: #http_agent_createconnection
 [`Buffer`]: buffer.html#buffer_buffer
 [`destroy()`]: #http_agent_destroy
 [`EventEmitter`]: events.html#events_class_events_eventemitter
@@ -1237,7 +1237,7 @@ There are a few special headers that should be noted.
 [`http.Server`]: #http_class_http_server
 [`http.ServerResponse`]: #http_class_http_serverresponse
 [`message.headers`]: #http_message_headers
-[`net.createConnection`]: net.html#net_net_createconnection_options_connectlistener
+[`net.createConnection()`]: net.html#net_net_createconnection_options_connectlistener
 [`net.Server`]: net.html#net_class_net_server
 [`net.Server.close()`]: net.html#net_server_close_callback
 [`net.Server.listen()`]: net.html#net_server_listen_handle_callback