Use SOCK_CLOEXEC instead of setting O_CLOEXEC manually

No other functional change intended.

Author: DemiMarie

agent/qrexec-fork-server.c

@@ -124,10 +124,6 @@ int main(int argc, char **argv) {
     }
 
     s = get_server_socket(socket_path);
-    if (fcntl(s, F_SETFD, O_CLOEXEC) < 0) {
-        PERROR("fcntl");
-        exit(1);
-    }
     /* fork into background */
     switch (fork()) {
         case -1:

libqrexec/unix-server.c

@@ -36,7 +36,7 @@ int get_server_socket(const char *socket_address)
 
     unlink(socket_address);
 
-    s = socket(AF_UNIX, SOCK_STREAM, 0);
+    s = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
     if (s < 0) {
         PERROR("socket");
         exit(1);