"Cipher = none" doesn't seem to be working properly

[Brian Prodoehl]

I have a simple pair of nodes set up, connected wirelessly, with tincd
1.0.16 running in switch mode.  Setting Cipher and Digest to "none",
and Compression to 0, the bridge is still CPU-bound, with most of
tincd's CPU time spent in libcrypto.  I narrowed it down to this line
in net_setup.c:

	myself->connection->outcipher = EVP_bf_ofb();

It looks as though all outgoing data is encrypted with blowfish,
regardless of the Cipher setting.  I pulled that assignment of
outcipher up to match what happens with incipher, and then my bridge
throughput doubled and tincd is no longer spending all that time in
libcrypto.  I didn't have a chance to test other Cipher settings, so
what I did may completely break encryption.  How should outcipher be
set?

-Brian