Start ensuring all OpenSSL "free" routines allow NULL, and remove
any if check before calling them.
This gets DH_free, DSA_free, RSA_free
Reviewed-by: Matt Caswell <matt@openssl.org>
manual when the specific function is refered to in the current manual text.
This correction was originally introduced in OpenBSD's tracking of OpenSSL.
docs. There were a couple of other places (including RSA) where the docs
were not quite synchronised with the API that are now fixed. One or two
still remain to be fixed though ...
