main: improved includes

- remove unused includes
- compat/alarm.h - export unistd.h (otherwise compat/alarm.h would be
seen as unneeded because unistd.h include per se)

Author: MartinPulec

src/compat/alarm.h

@@ -6,7 +6,7 @@
  * using default SIGALRM action which is terminate).
  */
 /*
- * Copyright (c) 2019-2025 CESNET, zájmové sdružení právnických osob
+ * Copyright (c) 2019-2026 CESNET, zájmové sdružení právnických osob
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -49,7 +49,7 @@
 EXTERN_C void alarm(unsigned int sec);
 
 #else
-#include <unistd.h>
+#include <unistd.h>           // IWYU pragma: export
 #endif /* _WIN32 */
 
 #endif // defined COMPAT_ALARM_H

src/main.cpp

@@ -74,7 +74,6 @@
 #include <getopt.h>
 #include <initializer_list>             // for initializer_list
 #include <iostream>
-#include <map>                          // for map
 #include <memory>
 #include <pthread.h>
 #include <stdexcept>
@@ -83,7 +82,6 @@
 #include <unistd.h>                     // for optarg, optind, STDERR...
 #include <unordered_map>                // for unordered_map
 #include <utility>                      // for move
-#include <vector>                       // for vector
 
 #define WANT_PTHREAD_NULL
 #include "audio/audio.h"                // for audio_options, additional_aud...