No copyright is claimed, and the software is hereby placed in the public domain. In case this attempt to disclaim copyright and place the software in the public domain is deemed null and void, then the software is Copyright (c) 1998-2011 Solar Designer and it is hereby released to the general public under the following terms:
Redistribution and use in source and binary forms, with or without modification, are permitted.
There's ABSOLUTELY NO WARRANTY, express or implied.
It is my intent that you should be able to use this on your system, as part of a software package, or anywhere else to improve security, ensure compatibility, or for any other purpose. I would appreciate it if you give credit where it is due and keep your modifications in the public domain as well, but I don't require that in order to let you place this code and any modifications you make under a license of your choice.