Rename http server Lua module and fix its documentation (#2594)

docs/en/lua-modules/httpserver.md

@@ -1,4 +1,4 @@
-# HTTP Module
+# HTTP Server Module
 | Since  | Origin / Contributor  | Maintainer  | Source  |
 | :----- | :-------------------- | :---------- | :------ |
 | 2015-01-19 | [Vladimir Dronnikov](https://github.com/dvv) | [Vladimir Dronnikov](https://github.com/dvv) | [http.lua](../../../lua_modules/http/http.lua) |
@@ -7,17 +7,17 @@ This Lua module provides a simple callback implementation of a [HTTP 1.1](https:
 
 ### Require
 ```lua
-httpserver = require("http")
+httpserver = require("httpserver")
 ```
 
 ### Release
 ```lua
 httpserver = nil
-package.loaded["http"] = nil
+package.loaded["httpserver"] = nil
 ```
 
 ## httpserver.createServer()
-Function to start HTTP 1.1 server.
+Function to start HTTP server.
 
 #### Syntax
 `httpserver.createServer(port, handler(req, res))` 
@@ -32,15 +32,23 @@ Function to start HTTP 1.1 server.
 #### Notes
 Callback function has 2 arguments: `req` (request) and `res` (response). The first object holds values:
 
-- `conn`: net.server sub module
-- `method`: Request method like `POST` or `GET`
-- `url`: Request URL
-- `onheader`: value to setup handler function for HTTP headers
-- `ondata`: value to setup handler function HTTP data like `content-type`
+- `conn`: `net.server` sub module
+- `method`: Request method that was used (e.g.`POST` or `GET`)
+- `url`: Requested URL
+- `onheader`: value to setup handler function for HTTP headers like `content-type`. Handler function has 3 parameters:
+
+	- `self`: `req` object
+	- `name`: Hearder name
+	- `value`: Header value 
+	
+- `ondata`: value to setup handler function HTTP data. Handler function has 2 parameters:
+	- `self`: `req` object
+	- `chunk`: Request data
 
 The second object holds functions:
-- `send(self, data, [response_code])`: Function to send data to client. `self` is `req` object, `data` is data to send and `response_code` is HTTP response code like 200 or 404 (for example)
-- `send_header(self, header_name, header_data)` Function to send HTTP headers to client. `self` is `req` object, `header_name` is HTTP header name and `header_data` is HTTP header data for client.
+
+- `send(self, data, [response_code])`: Function to send data to client. `self` is `req` object, `data` is data to send and `response_code` is HTTP response code like `200` or `404` (for example)
+- `send_header(self, header_name, header_data)`: Function to send HTTP headers to client. `self` is `req` object, `header_name` is HTTP header name and `header_data` is HTTP header data for client.
 - `finish([data])`: Function to finalize connection, optionally sending data. `data` is optional data to send on connection finalizing.
 
 Full example can be found in [http-example.lua](../../../lua_modules/http/http-example.lua)

lua_modules/http/http-example.lua

@@ -4,7 +4,7 @@
 -- LICENCE: http://opensource.org/licenses/MIT
 -- Vladimir Dronnikov <dronnikov@gmail.com>
 ------------------------------------------------------------------------------
-require("http").createServer(80, function(req, res)
+require("httpserver").createServer(80, function(req, res)
   -- analyse method and url
   print("+R", req.method, req.url, node.heap())
   -- setup handler of headers, if any

mkdocs.yml

@@ -43,6 +43,7 @@ pages:
     - 'ds3231': 'en/lua-modules/ds3231.md'
     - 'ftpserver': 'en/lua-modules/ftpserver.md'
     - 'hdc1000': 'en/lua-modules/hdc1000.md'
+    - 'httpserver': 'en/lua-modules/httpserver.md'
     - 'imap': 'en/lua-modules/imap.md'
     - 'lm92': 'en/lua-modules/lm92.md'
     - 'mcp23008': 'en/lua-modules/mcp23008.md'