Package vhttpd-utils: Information

- Fix: In the case of a UTF-8 conversion error try to interpret
  the HTTP request body as Latin-1 string.

- Drop libgnutls-devel from BR for now.
- tests: Make test_message_write independent from lines order.

- Use _unpackaged_files_terminate_build.
- Set connection socket non-block immediately if needed.
- Don't modify Makefile for e2k.
- Don't hardcode guile version in the Makefile.
- Get rid of close_on_exec().
- Set CLOEXEC flag for accepted connection socket.
- Drop unused variable.
- Fix BR for non-e2k architectures.
- Add OpenSSL 1.1 support.