doc: corrected typo in vm docs

Reviewed-by: Trevor Norris <trev.norris@gmail.com>
buffer: improve Buffer constructor

Increase the performance of new Buffer construction by initializing all
properties before SetIndexedPropertiesToExternalArrayData call.

Reviewed-by: Trevor Norris <trev.norris@gmail.com>
http: write() after end() emits an error.

When calling write() after end() has been called on an OutgoingMessage,
an error is emitted and the write's callback is called with an instance
of Error.

Fix #7477.

Reviewed-By: Fedor Indutny <fedor@indutny.com>
crypto: export externals to internal structs

Export External getters for a internal structs: SSL, SSL_CTX.
deps: update uv to v1.0.0-rc1