mxqd: Simplify reexec

Currently argv is converted to a string and back to an array before mxqd
reexecs itself. Use the original argv instead.

Difference is, that options are not included in the informational
messages.

mxqd.c

@@ -2874,27 +2874,12 @@ int main(int argc, char *argv[])
     server_close(server);
 
     while (global_sigrestart_cnt) {
-        _mx_cleanup_free_ char *saved_argv_str = NULL;
-        char **saved_argv;
-
-        saved_argv_str = mx_strvec_to_str(argv);
-
-        mx_log_info("Reexecuting mxqd... ");
-
-        saved_argv = mx_strvec_from_str(saved_argv_str);
-        if (!saved_argv) {
-            mx_log_fatal("Can't recaculate commandline. str_to_strvev(%s) failed: %m", saved_argv_str);
-            break;
-        }
-
         mx_log_info("-------------------------------------------------------------");
-        mx_log_info(" Reexecuting %s", saved_argv_str);
+        mx_log_info(" Reexecuting %s", argv[0]);
         mx_log_info("-------------------------------------------------------------");
-
-        res = execvp(saved_argv[0], saved_argv);
-        mx_log_fatal("execvp(\"%s\", ...): %m", saved_argv[0]);
+        res = execvp(argv[0], argv);
+        mx_log_fatal("execvp(\"%s\", ...): %m", argv[0]);
         break;
-
     }
 
     mx_log_info("cu, mx.");