Fix typo in check_if_maxsock_permitted() description.
/* Tests if it is possible to set the current process's RLIMIT_NOFILE to
* <maxsock>, then sets it back to the previous value. Returns non-zero if the
- * value is accepted, non-zero otherwise. This is used to determine if an
+ * value is accepted, zero otherwise. This is used to determine if an
* automatic limit may be applied or not. When it is not, the caller knows that
* the highest we can do is the rlim_max at boot. In case of error, we return
* that the setting is possible, so that we defer the error processing to the