[Bro] Source build on OpenBSD 5.0

[Siwek, Jonathan Luke]

>> The two questions that come to mind are: Do I need a _real_ BIND8
>> installation (not included in OpenBSD) or will the provided
>> libbind-9.4.2 package work?
> 
> I'm guessing libbind should work. cmake/FindBIND.cmake shows what
> configure is looking for: include/resolv.h and the functions
> ns_initparse/res_mkquery in either libbind or libresolv.

The libbind-9.4.2 package does work, but the headers get put in an unexpected place for which I need to patch cmake/FindBIND.cmake to find correctly.  And I'm running into a couple other configure problems showing up on OpenBSD after that, but I might have some fixes soon.

+Jon