tls: rename `clientError` to `tlsClientError`

`clientError` will have `http.Server`-specific behavior, and we don't
want to shadow it in `tls.Server`.

PR-URL: https://github.com/nodejs/node/pull/4557
Reviewed-By: Brian White <mscdex@mscdex.net>

doc/api/tls.markdown

@@ -169,7 +169,7 @@ This class is a subclass of `net.Server` and has the same methods on it.
 Instead of accepting just raw TCP connections, this accepts encrypted
 connections using TLS or SSL.
 
-### Event: 'clientError'
+### Event: 'tlsClientError'
 
 `function (exception, tlsSocket) { }`
 

lib/_tls_wrap.js

@@ -809,14 +809,14 @@ function Server(/* [options], listener */) {
         errorEmitted = true;
         var connReset = new Error('socket hang up');
         connReset.code = 'ECONNRESET';
-        self.emit('clientError', connReset, socket);
+        self.emit('tlsClientError', connReset, socket);
       }
     });
 
     socket.on('_tlsError', function(err) {
       if (!socket._controlReleased && !errorEmitted) {
         errorEmitted = true;
-        self.emit('clientError', err, socket);
+        self.emit('tlsClientError', err, socket);
       }
     });
   });

test/parallel/test-tls-econnreset.js

@@ -48,7 +48,7 @@ var connectError = null;
 
 var server = tls.createServer({ ca: ca, cert: cert, key: key }, function(conn) {
   throw 'unreachable';
-}).on('clientError', function(err, conn) {
+}).on('tlsClientError', function(err, conn) {
   assert(!clientError && conn);
   clientError = err;
 }).listen(common.PORT, function() {

test/parallel/test-tls-no-sslv3.js

@@ -48,7 +48,7 @@ server.listen(common.PORT, '127.0.0.1', function() {
   }));
 });
 
-server.on('clientError', err => errors.push(err));
+server.on('tlsClientError', err => errors.push(err));
 
 process.on('exit', function() {
   if (/unknown option -ssl3/.test(stderr)) {

test/parallel/test-tls-sni-option.js

@@ -110,7 +110,7 @@ var server = tls.createServer(serverOptions, function(c) {
   serverResults.push({ sni: c.servername, authorized: c.authorized });
 });
 
-server.on('clientError', function(err) {
+server.on('tlsClientError', function(err) {
   serverResults.push(null);
   serverError = err.message;
 });

test/parallel/test-tls-timeout-server.js

@@ -25,7 +25,7 @@ var options = {
 
 var server = tls.createServer(options, common.fail);
 
-server.on('clientError', function(err, conn) {
+server.on('tlsClientError', function(err, conn) {
   conn.destroy();
   server.close();
   clientErrors++;