doc: fix links in tls, cluster docs

Fix missing links described in #5322.

PR-URL: https://github.com/nodejs/node/pull/5364
Reviewed-By: Roman Reiss <me@silverwind.io>

doc/api/cluster.markdown

@@ -244,7 +244,7 @@ Causes `.suicide` to be set.
 Note that after a server is closed, it will no longer accept new connections,
 but connections may be accepted by any other listening worker. Existing
 connections will be allowed to close as usual. When no more connections exist,
-see [server.close()][], the IPC channel to the worker will close allowing it to
+see [`server.close()`][], the IPC channel to the worker will close allowing it to
 die gracefully.
 
 The above applies *only* to server connections, client connections are not

doc/api/tls.markdown

@@ -72,7 +72,7 @@ server-side resources, which makes it a potential vector for denial-of-service
 attacks.
 
 To mitigate this, renegotiations are limited to three times every 10 minutes. An
-error is emitted on the [tls.TLSSocket][] instance when the threshold is
+error is emitted on the [`tls.TLSSocket`][] instance when the threshold is
 exceeded. The limits are configurable:
 
   - `tls.CLIENT_RENEG_LIMIT`: renegotiation limit, default is 3.
@@ -155,7 +155,7 @@ is expensive.
 
 ## Class: CryptoStream
 
-    Stability: 0 - Deprecated: Use [`tls.TLSSocket()`][] instead.
+    Stability: 0 - Deprecated: Use [`tls.TLSSocket`][] instead.
 
 This is an encrypted stream.
 
@@ -190,7 +190,7 @@ connections using TLS or SSL.
 When a client connection emits an `'error'` event before secure connection is
 established - it will be forwarded here.
 
-`tlsSocket` is the [tls.TLSSocket][] that the error originated from.
+`tlsSocket` is the [`tls.TLSSocket`][] that the error originated from.
 
 ### Event: 'newSession'
 
@@ -272,7 +272,7 @@ server.on('resumeSession', (id, cb) => {
 `function (tlsSocket) {}`
 
 This event is emitted after a new connection has been successfully
-handshaked. The argument is an instance of [tls.TLSSocket][]. It has all the
+handshaked. The argument is an instance of [`tls.TLSSocket`][]. It has all the
 common stream methods and events.
 
 `socket.authorized` is a boolean value which indicates if the
@@ -649,7 +649,7 @@ Creates a new client connection to the given `port` and `host` (old API) or
 The `callback` parameter will be added as a listener for the
 [`'secureConnect'`][] event.
 
-`tls.connect()` returns a [tls.TLSSocket][] object.
+`tls.connect()` returns a [`tls.TLSSocket`][] object.
 
 Here is an example of a client of echo server as described previously:
 
@@ -756,12 +756,12 @@ and the cleartext one is used as a replacement for the initial encrypted stream.
    automatically reject clients with invalid certificates. Only applies to
    servers with `requestCert` enabled.
 
- - `options`: An object with common SSL options. See [tls.TLSSocket][].
+ - `options`: An object with common SSL options. See [`tls.TLSSocket`][].
 
 `tls.createSecurePair()` returns a SecurePair object with `cleartext` and
 `encrypted` stream properties.
 
-NOTE: `cleartext` has the same APIs as [tls.TLSSocket][]
+NOTE: `cleartext` has the same APIs as [`tls.TLSSocket`][]
 
 ## tls.createServer(options[, secureConnectionListener])
 
@@ -978,7 +978,7 @@ console.log(ciphers); // ['AES128-SHA', 'AES256-SHA', ...]
 [`crypto.getCurves()`]: crypto.html#crypto_crypto_getcurves
 [`tls.createServer()`]: #tls_tls_createserver_options_secureconnectionlistener
 [`tls.createSecurePair()`]: #tls_tls_createsecurepair_context_isserver_requestcert_rejectunauthorized_options
-[`tls.TLSSocket()`]: #tls_class_tls_tlssocket
+[`tls.TLSSocket`]: #tls_class_tls_tlssocket
 [`net.Server`]: net.html#net_class_net_server
 [`net.Socket`]: net.html#net_class_net_socket
 [`net.Server.address()`]: net.html#net_server_address