tree-wide: fix a number of log calls that use %m but have no errno set

This is mostly fall-out from d1a1f0aaf0,
however some cases are older bugs.

There might be more issues lurking, this was a simple grep for "%m"
across the tree, with all lines removed that mention "errno" at all.

src/basic/fs-util.c

@@ -1155,9 +1155,9 @@ int fsync_directory_of_file(int fd) {
 
         r = fd_get_path(fd, &path);
         if (r < 0) {
-                log_debug("Failed to query /proc/self/fd/%d%s: %m",
-                          fd,
-                          r == -EOPNOTSUPP ? ", ignoring" : "");
+                log_debug_errno(r, "Failed to query /proc/self/fd/%d%s: %m",
+                                fd,
+                                r == -EOPNOTSUPP ? ", ignoring" : "");
 
                 if (r == -EOPNOTSUPP)
                         /* If /proc is not available, we're most likely running in some