Compilation error on closefrom

[J. Thomsen]

After upgrading from Fedora 34 to Fedora 35 I cannot compile Postfix (3.6.x) 
due to this

[src/util]
gcc -I. -I../../include -DHAS_DEV_URANDOM -DHAS_PCRE -UUSE_DYNAMIC_LIBS 
-DDEF_SHLIB_DIR=\"no\"
-UUSE_DYNAMIC_MAPS -Wmissing-prototypes -Wformat -Wno-comment -fno-common  -g 
-O -I. -DLINUX5 -c
attr_clnt.c


In file included from attr_clnt.c:97:
/usr/include/unistd.h:363:13: error: conflicting types for ‘closefrom’; have 
‘void(int)’
  363 | extern void closefrom (int __lowfd) __THROW;
      |             ^~~~~~~~~
In file included from attr_clnt.c:96:
./sys_defs.h:1512:12: note: previous declaration of ‘closefrom’ with type 
‘int(int)’
 1512 | extern int closefrom(int);
      |            ^~~~~~~~~


- Jørgen Thomsen