doc: git mv to .md

* doc: rename .markdown references in content
* doc: rename to .md in tools
* doc: rename to .md in CONTRIBUTING.md

PR-URL: https://github.com/nodejs/node/pull/4747
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: techjeffharris
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

doc/api/https.md

@@ -0,0 +1,246 @@
+# HTTPS
+
+    Stability: 2 - Stable
+
+HTTPS is the HTTP protocol over TLS/SSL. In Node.js this is implemented as a
+separate module.
+
+## Class: https.Agent
+
+An Agent object for HTTPS similar to [`http.Agent`][].  See [`https.request()`][]
+for more information.
+
+## Class: https.Server
+
+This class is a subclass of `tls.Server` and emits events same as
+[`http.Server`][]. See [`http.Server`][] for more information.
+
+### server.setTimeout(msecs, callback)
+
+See [`http.Server#setTimeout()`][].
+
+### server.timeout
+
+See [`http.Server#timeout`][].
+
+## https.createServer(options[, requestListener])
+
+Returns a new HTTPS web server object. The `options` is similar to
+[`tls.createServer()`][].  The `requestListener` is a function which is
+automatically added to the `'request'` event.
+
+Example:
+
+```js
+// curl -k https://localhost:8000/
+const https = require('https');
+const fs = require('fs');
+
+const options = {
+  key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
+  cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem')
+};
+
+https.createServer(options, (req, res) => {
+  res.writeHead(200);
+  res.end('hello world\n');
+}).listen(8000);
+```
+
+Or
+
+```js
+const https = require('https');
+const fs = require('fs');
+
+const options = {
+  pfx: fs.readFileSync('server.pfx')
+};
+
+https.createServer(options, (req, res) => {
+  res.writeHead(200);
+  res.end('hello world\n');
+}).listen(8000);
+```
+
+### server.close([callback])
+
+See [`http.close()`][] for details.
+
+### server.listen(handle[, callback])
+### server.listen(path[, callback])
+### server.listen(port[, host][, backlog][, callback])
+
+See [`http.listen()`][] for details.
+
+## https.get(options, callback)
+
+Like [`http.get()`][] but for HTTPS.
+
+`options` can be an object or a string. If `options` is a string, it is
+automatically parsed with [`url.parse()`][].
+
+Example:
+
+```js
+const https = require('https');
+
+https.get('https://encrypted.google.com/', (res) => {
+  console.log('statusCode: ', res.statusCode);
+  console.log('headers: ', res.headers);
+
+  res.on('data', (d) => {
+    process.stdout.write(d);
+  });
+
+}).on('error', (e) => {
+  console.error(e);
+});
+```
+
+## https.globalAgent
+
+Global instance of [`https.Agent`][] for all HTTPS client requests.
+
+## https.request(options, callback)
+
+Makes a request to a secure web server.
+
+`options` can be an object or a string. If `options` is a string, it is
+automatically parsed with [`url.parse()`][].
+
+All options from [`http.request()`][] are valid.
+
+Example:
+
+```js
+const https = require('https');
+
+var options = {
+  hostname: 'encrypted.google.com',
+  port: 443,
+  path: '/',
+  method: 'GET'
+};
+
+var req = https.request(options, (res) => {
+  console.log('statusCode: ', res.statusCode);
+  console.log('headers: ', res.headers);
+
+  res.on('data', (d) => {
+    process.stdout.write(d);
+  });
+});
+req.end();
+
+req.on('error', (e) => {
+  console.error(e);
+});
+```
+
+The options argument has the following options
+
+- `host`: A domain name or IP address of the server to issue the request to.
+  Defaults to `'localhost'`.
+- `hostname`: Alias for `host`. To support `url.parse()` `hostname` is
+  preferred over `host`.
+- `family`: IP address family to use when resolving `host` and `hostname`.
+  Valid values are `4` or `6`. When unspecified, both IP v4 and v6 will be
+  used.
+- `port`: Port of remote server. Defaults to 443.
+- `localAddress`: Local interface to bind for network connections.
+- `socketPath`: Unix Domain Socket (use one of host:port or socketPath).
+- `method`: A string specifying the HTTP request method. Defaults to `'GET'`.
+- `path`: Request path. Defaults to `'/'`. Should include query string if any.
+  E.G. `'/index.html?page=12'`. An exception is thrown when the request path
+  contains illegal characters. Currently, only spaces are rejected but that
+  may change in the future.
+- `headers`: An object containing request headers.
+- `auth`: Basic authentication i.e. `'user:password'` to compute an
+  Authorization header.
+- `agent`: Controls [`Agent`][] behavior. When an Agent is used request will
+  default to `Connection: keep-alive`. Possible values:
+ - `undefined` (default): use [`globalAgent`][] for this host and port.
+ - `Agent` object: explicitly use the passed in `Agent`.
+ - `false`: opts out of connection pooling with an Agent, defaults request to
+   `Connection: close`.
+
+The following options from [`tls.connect()`][] can also be specified. However, a
+[`globalAgent`][] silently ignores these.
+
+- `pfx`: Certificate, Private key and CA certificates to use for SSL. Default `null`.
+- `key`: Private key to use for SSL. Default `null`.
+- `passphrase`: A string of passphrase for the private key or pfx. Default `null`.
+- `cert`: Public x509 certificate to use. Default `null`.
+- `ca`: A string, [`Buffer`][] or array of strings or [`Buffer`][]s of trusted
+  certificates in PEM format. If this is omitted several well known "root"
+  CAs will be used, like VeriSign. These are used to authorize connections.
+- `ciphers`: A string describing the ciphers to use or exclude. Consult
+  <https://www.openssl.org/docs/apps/ciphers.html#CIPHER_LIST_FORMAT> for
+  details on the format.
+- `rejectUnauthorized`: If `true`, the server certificate is verified against
+  the list of supplied CAs. An `'error'` event is emitted if verification
+  fails. Verification happens at the connection level, *before* the HTTP
+  request is sent. Default `true`.
+- `secureProtocol`: The SSL method to use, e.g. `SSLv3_method` to force
+  SSL version 3. The possible values depend on your installation of
+  OpenSSL and are defined in the constant [`SSL_METHODS`][].
+- `servername`: Servername for SNI (Server Name Indication) TLS extension.
+
+In order to specify these options, use a custom [`Agent`][].
+
+Example:
+
+```js
+var options = {
+  hostname: 'encrypted.google.com',
+  port: 443,
+  path: '/',
+  method: 'GET',
+  key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
+  cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem')
+};
+options.agent = new https.Agent(options);
+
+var req = https.request(options, (res) => {
+  ...
+}
+```
+
+Alternatively, opt out of connection pooling by not using an `Agent`.
+
+Example:
+
+```js
+var options = {
+  hostname: 'encrypted.google.com',
+  port: 443,
+  path: '/',
+  method: 'GET',
+  key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
+  cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem'),
+  agent: false
+};
+
+var req = https.request(options, (res) => {
+  ...
+}
+```
+
+[`Agent`]: #https_class_https_agent
+[`Buffer`]: buffer.html#buffer_buffer
+[`globalAgent`]: #https_https_globalagent
+[`http.Agent`]: http.html#http_class_http_agent
+[`http.close()`]: http.html#http_server_close_callback
+[`http.get()`]: http.html#http_http_get_options_callback
+[`http.listen()`]: http.html#http_server_listen_port_hostname_backlog_callback
+[`http.request()`]: http.html#http_http_request_options_callback
+[`http.Server#setTimeout()`]: http.html#http_server_settimeout_msecs_callback
+[`http.Server#timeout`]: http.html#http_server_timeout
+[`http.Server`]: http.html#http_class_http_server
+[`https.Agent`]: #https_class_https_agent
+[`https.request()`]: #https_https_request_options_callback
+[`SSL_METHODS`]: https://www.openssl.org/docs/ssl/ssl.html#DEALING_WITH_PROTOCOL_METHODS
+[`tls.connect()`]: tls.html#tls_tls_connect_options_callback
+[`tls.createServer()`]: tls.html#tls_tls_createserver_options_secureconnectionlistener
+[`url.parse()`]: url.html#url_url_parse_urlstr_parsequerystring_slashesdenotehost