doc: fix relative links in net docs

They were not being processed as relative links.

PR-URL: #5358
Reviewed-By: Roman Reiss <me@silverwind.io>

Author: evanlucas

doc/api/net.markdown

@@ -109,7 +109,7 @@ The last parameter `callback` will be added as a listener for the
 [`'listening'`][] event.
 
 The parameter `backlog` behaves the same as in
-[`server.listen(port, \[host\], \[backlog\], \[callback\])`][].
+[`server.listen(port[, hostname][, backlog][, callback])`][`server.listen(port, host, backlog, callback)`].
 
 ### server.listen(options[, callback])
 
@@ -123,8 +123,8 @@ The parameter `backlog` behaves the same as in
 
 The `port`, `host`, and `backlog` properties of `options`, as well as the
 optional callback function, behave as they do on a call to
-[`server.listen(port, \[host\], \[backlog\], \[callback\])`][]. Alternatively,
-the `path` option can be used to specify a UNIX socket.
+[`server.listen(port[, hostname][, backlog][, callback])`][`server.listen(port, host, backlog, callback)`].
+Alternatively, the `path` option can be used to specify a UNIX socket.
 
 If `exclusive` is `false` (default), then cluster workers will use the same
 underlying handle, allowing connection handling duties to be shared. When
@@ -169,7 +169,7 @@ double-backslashes, such as:
         path.join('\\\\?\\pipe', process.cwd(), 'myctl'))
 
 The parameter `backlog` behaves the same as in
-[`server.listen(port, \[host\], \[backlog\], \[callback\])`][].
+[`server.listen(port[, hostname][, backlog][, callback])`][`server.listen(port, host, backlog, callback)`].
 
 ### server.listen(port[, hostname][, backlog][, callback])
 
@@ -389,7 +389,7 @@ The `connectListener` parameter will be added as a listener for the
 ### socket.connect(path[, connectListener])
 ### socket.connect(port[, host][, connectListener])
 
-As [`socket.connect(options\[, connectListener\])`][],
+As [`socket.connect(options\[, connectListener\])`][`socket.connect(options, connectListener)`],
 with options either as either `{port: port, host: host}` or `{path: path}`.
 
 ### socket.destroy()
@@ -720,8 +720,8 @@ Returns true if input is a version 6 IP address, otherwise returns false.
 [`pause()`]: #net_socket_pause
 [`resume()`]: #net_socket_resume
 [`server.getConnections()`]: #net_server_getconnections_callback
-[`server.listen(port, \[host\], \[backlog\], \[callback\])`]: #net_server_listen_port_hostname_backlog_callback
-[`socket.connect(options\[, connectListener\])`]: #net_socket_connect_options_connectlistener
+[`server.listen(port, host, backlog, callback)`]: #net_server_listen_port_hostname_backlog_callback
+[`socket.connect(options, connectListener)`]: #net_socket_connect_options_connectlistener
 [`socket.connect`]: #net_socket_connect_options_connectlistener
 [`socket.setTimeout()`]: #net_socket_settimeout_timeout_callback
 [`stream.setEncoding()`]: stream.html#stream_readable_setencoding_encoding