bio_err is initialised in main, hence there is no need to initialise it

bio_err is initialised in main, hence there is no need to initialise it
in each application (since there is no longer a non-monolithic mode).

In typical OpenSSL fashion, the code is inconsistent and there are multiple
ways that bio_err was initialised - none of them actually checked to see if
the initialisation actually succeeded. Additionally, it is worth noting
that in at least two cases bio_err was also being used before it would have
been initialised.

ok miod@