tree-wide: Make sure all headers are standalone

Let's make sure all of our headers include everything they require.

src/basic/iovec-wrapper.h

@@ -5,6 +5,7 @@
 #include <sys/uio.h>
 
 #include "macro.h"
+#include "memory-util.h"
 
 struct iovec_wrapper {
         struct iovec *iovec;

src/basic/missing_xfs.h

@@ -1,6 +1,8 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
+#include <stdint.h>
+
 /* This is currently not exported in the public kernel headers, but the libxfs library code part of xfsprogs
  * defines it as public header */
 

src/basic/pcapng.h

@@ -1,6 +1,8 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
+#include <stdint.h>
+
 /*
  * For details about the file format see RFC:
  *   https://www.ietf.org/id/draft-tuexen-opsawg-pcapng-03.html

src/basic/pthread-util.h

@@ -3,7 +3,7 @@
 
 #include <pthread.h>
 
-#include "macro.h"
+#include "assert-util.h"
 
 static inline pthread_mutex_t* pthread_mutex_lock_assert(pthread_mutex_t *mutex) {
         assert_se(pthread_mutex_lock(mutex) == 0);

src/basic/raw-reboot.h

@@ -4,6 +4,7 @@
 #include <linux/reboot.h>
 #include <sys/reboot.h>
 #include <sys/syscall.h>
+#include <unistd.h>
 
 /* glibc defines the reboot() API call, which is a wrapper around the system call of the same name, but without the
  * extra "arg" parameter. Since we need that parameter for some calls, let's add a "raw" wrapper that is defined the

src/basic/strbuf.h

@@ -5,7 +5,7 @@
 #include <stdint.h>
 #include <sys/types.h>
 
-#include "macro.h"
+#include "memory-util.h"
 
 struct strbuf {
         char *buf;

src/basic/sysctl-util.h

@@ -4,6 +4,7 @@
 #include <stdbool.h>
 #include <stdint.h>
 
+#include "hashmap.h"
 #include "macro.h"
 #include "stdio-util.h"
 #include "string-util.h"

src/basic/uid-classification.h

@@ -4,6 +4,8 @@
 #include <stdbool.h>
 #include <sys/types.h>
 
+#include "macro.h"
+
 /* The container base should have the last 16 bit set to zero */
 assert_cc((CONTAINER_UID_BASE_MIN & 0xFFFFU) == 0);
 assert_cc((CONTAINER_UID_BASE_MAX & 0xFFFFU) == 0);

src/basic/uid-range.h

@@ -4,7 +4,7 @@
 #include <stdbool.h>
 #include <sys/types.h>
 
-#include "macro.h"
+#include "memory-util.h"
 
 typedef struct UIDRangeEntry {
         uid_t start, nr;