Use a NULL camera device which sends a black imge when setting camera to None

Ignore-this: 77e58946a00c7d11ef1fcbf67c434499

darcs-hash:20140929115204-56b4d-2ddaad3e0dde489c7d658251d6d8b90ecb8beb6c
Override device framerate for Null and Colorbar devices

Ignore-this: c6476540507c77bcd330c22895823231

darcs-hash:20140929142222-56b4d-1c5e9edf5f9b34854b024470c6c6ab9b3d60d8a5
Use SSLv23 method for TLS

Ignore-this: a1cb53db77b1b7549bab86930c77c831

As misleading as it may sound, this enables TLSv1, TLSv1.1 and TLSv1.2, with
fallback for SSLv3. This makes it possible to use AES-GCM ciphers (assuming both
client and server support them), which allows us to obtain Perfect Forward Secrecy.

https://www.openssl.org/docs/ssl/SSL_CTX_new.html

darcs-hash:20141001123456-56b4d-55086123aef19eec2fcfbdca394b956ebceb5c16