allow a request to be processed in a job

Now we allow a request to be passed into a job queue,
and after the job finishes the request is passed into
a controller again. In order to achieve this we have
a requests queue in System, when we put a request
to the job this Request structure is preserved in the
queue and for a new request a new Request is added to
the queue.

while here:
- remove App::Lock()/Unlock(), use scoped locking
- fix: Plugin now has a Call method which takes ModelConnector
  and a logger (used in multithreaded environment)
- BaseThread has a main_model_connector pointer
  to the main (from the main thread) model connector
- the FastCGI structure fcgi_request moved from App to Request
- some methods for handling requests moved from App to Request
- small refactoring in main.cpp
- add Http class (a http client)

winixd/core/config.cpp

@@ -135,7 +135,7 @@ void Config::AssignValues()
 	fcgi_socket_chmod 		= Int(L"fcgi_socket_chmod", 0770);
 	fcgi_socket_user  		= Text(L"fcgi_socket_user");
 	fcgi_socket_group 		= Text(L"fcgi_socket_group");
-	fcgi_socket_listen		= Int(L"fcgi_socket_listen", 100);
+	fcgi_socket_listen		= Int(L"fcgi_socket_listen", 1024);
 	log_level				= Int(L"log_level", 1);
 	log_request				= Int(L"log_request", 1);
 	log_save_each_line 		= Bool(L"log_save_each_line", false);
@@ -344,6 +344,8 @@ void Config::AssignValues()
 	use_antispam_mechanism_for_not_logged_users = Bool(L"use_antispam_mechanism_for_not_logged_users", true);
 	antispam_list_max_size  = Size(L"antispam_list_max_size", 10);
 	add_header_cache_no_store_in_htmx_request = Bool(L"add_header_cache_no_store_in_htmx_request", true);
+
+	request_queue_job_limit = Size(L"request_queue_job_limit", 1024);
 }