doc: fixed the wrong phase for lua_need_request_body (openresty#1758)

Author: jf

README.markdown

@@ -2535,7 +2535,7 @@ lua_need_request_body
 
 **phase:** *depends on usage*
 
-Determines whether to force the request body data to be read before running rewrite/access/access_by_lua* or not. The Nginx core does not read the client request body by default and if request body data is required, then this directive should be turned `on` or the [ngx.req.read_body](#ngxreqread_body) function should be called within the Lua code.
+Determines whether to force the request body data to be read before running rewrite/access/content_by_lua* or not. The Nginx core does not read the client request body by default and if request body data is required, then this directive should be turned `on` or the [ngx.req.read_body](#ngxreqread_body) function should be called within the Lua code.
 
 To read the request body data within the [$request_body](http://nginx.org/en/docs/http/ngx_http_core_module.html#var_request_body) variable,
 [client_body_buffer_size](http://nginx.org/en/docs/http/ngx_http_core_module.html#client_body_buffer_size) must have the same value as [client_max_body_size](http://nginx.org/en/docs/http/ngx_http_core_module.html#client_max_body_size). Because when the content length exceeds [client_body_buffer_size](http://nginx.org/en/docs/http/ngx_http_core_module.html#client_body_buffer_size) but less than [client_max_body_size](http://nginx.org/en/docs/http/ngx_http_core_module.html#client_max_body_size), Nginx will buffer the data into a temporary file on the disk, which will lead to empty value in the [$request_body](http://nginx.org/en/docs/http/ngx_http_core_module.html#var_request_body) variable.

doc/HttpLuaModule.wiki

@@ -2133,7 +2133,7 @@ This directive was first introduced in the <code>v0.10.0</code> release.
 
 '''phase:''' ''depends on usage''
 
-Determines whether to force the request body data to be read before running rewrite/access/access_by_lua* or not. The Nginx core does not read the client request body by default and if request body data is required, then this directive should be turned <code>on</code> or the [[#ngx.req.read_body|ngx.req.read_body]] function should be called within the Lua code.
+Determines whether to force the request body data to be read before running rewrite/access/content_by_lua* or not. The Nginx core does not read the client request body by default and if request body data is required, then this directive should be turned <code>on</code> or the [[#ngx.req.read_body|ngx.req.read_body]] function should be called within the Lua code.
 
 To read the request body data within the [[HttpCoreModule#$request_body|$request_body]] variable,
 [[HttpCoreModule#client_body_buffer_size|client_body_buffer_size]] must have the same value as [[HttpCoreModule#client_max_body_size|client_max_body_size]]. Because when the content length exceeds [[HttpCoreModule#client_body_buffer_size|client_body_buffer_size]] but less than [[HttpCoreModule#client_max_body_size|client_max_body_size]], Nginx will buffer the data into a temporary file on the disk, which will lead to empty value in the [[HttpCoreModule#$request_body|$request_body]] variable.