Stop pretending that openssl(1) applications support the -rand option.
The underlying code has long been removed, making this a no-op.

If your random subsystem actually requires that you seed it from a file,
then you really should go and buy a new random subsystem that was built
after 1990.

Diff from Brent Cook.

ok deraadt@
Remove RANDFILE remnants.
Fix memory leak.

(From Martin Brejcha)

OK from tedu@, miod@ and deraadt@