Comment fixed.

src/libraries/libisc-new/src/intern.h

@@ -100,7 +100,7 @@ isc_setabortfn(void (*abortfn)(const char  * msg));
 
 /*
  * Move a file descriptor FD the first unused file descriptor higher
- * than LIMIT.  Return the new file descriptor.  Close FD.
+ * than or equal to LIMIT.  Return the new file descriptor.  Close FD.
  *
  * On failure, the old FD will be returned, and errno will be set.
  *