doc: document 'ciphers' option of tls.connect
doc: document 'ciphers' option of tls.connect

This option has been there for a long time, but has never been
documented. It's functionally identical to the server counterpart.

PR-URL: https://github.com/iojs/io.js/pull/845
Reviewed-By: Ben Noordhuis <59bd0a3ff43b32849b319e645d4798d8a5d1e889@bnoordhuis.nl>

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node