DB integration: initial support. user login by DB.

src/main.c

@@ -1,6 +1,7 @@
 #include "main.h"
 #include "file_p.h"
 #include "server.h"
+#include "db.h"
 
 /* *** MAIN *** */
 int main(int argc, char *argv[]) {
@@ -9,6 +10,7 @@ int main(int argc, char *argv[]) {
   server_data.welcome_message = get_welcome_mes();
   server_data.fl_start = NULL;
   server_data.fl_current = NULL;
+  init_connection();
   get_files_descriptions(&server_data);
   server_data.ls = start_server();
   server_main_loop(&server_data);