[dwm] slock and BSD shadow passwords

[Erik T . Törnqvist]

Hi,

I've added support for BSD shadow passwords. Remove -DHAVE_SHADOW_H from CFLAGS
to enable it; and if you use OpenBSD, remove -lcrypt from LIBS as well.

Tested on Free- and OpenBSD.

http://thorntwig.se/slock-bsdsp.diff


/Erik T. Tornqvist