Importing bitstring.h?

[Venkatesh Srinivas]

Hi,

I find myself missing bitstring.h on non *BSD systems; would it be alright 
to add it to libbsd?

If so, here is a patch that does so:
http://endeavour.zapto.org/src/0001-Import-bitstring.h-from-DragonFly.patch

Thanks!
-- vs