Re: "openssl" should not be optional

Re: Daniel Gustafsson
> It seems a bit restrictive to require the openssl binary which is test-only,
> since we allow building with ssl but without TAP support (which is where the
> openssl binary is used).

Ok, but then the error messages should be better. This was found
because a fellow Debian developer was smart enough to spot the extra
space in that " x509" error message... (And another one knew about
this difference between the different build environments.)

Christoph