Log Message:
devel/libbsd: update to 0.11.8

# noteworthy changes (since 0.11.7)

- Portability fixes for Solaris, macOS and AIX [needs to be tested on
  pkgsrc, to see wether we can unbreak the package on these platforms]
- Build fixes for the modern C effort.
- Adjust declaration shadowing to match new glibc additions.
- Manual page sync to get rid of the last BSD-4-Clause
  license.
- Manual pages, documentation and build system
  cleanups.