uv: revert change causing build failures

Revert uv_thread_self() to return unsigned long instead of uv_thread_t.
This was causing a build failure on Windows and is only a temporary fix
until the proper patch lands upstream.

Reverts: https://github.com/joyent/libuv/commit/59658a8
Fixes: ce112c2 "deps: update uv to v1.0.0-rc2"
doc: remove tls.createSecurePair deprecation

pending tls.TLSSocket growing the ability to work
with streams, createSecurePair will remain.

PR-URL: https://github.com/joyent/node/pull/8695
Reviewed-by: Fedor Indutny <fedor@indutny.com>
tls: remove tls.createSecurePair code deprecation

In https://github.com/joyent/node/pulls/8695, the deprecation was
removed from doc.  This removes the deprecation from the code.

PR-URL: https://github.com/joyent/node/pull/8700
Reviewed-by: Chris Dickinson <christopher.s.dickinson@gmail.com>
doc: note ability to require files within packages

Adding note to api/modules.markdown about ability to
load arbitrary path from modules from node_module path
by adding reference to path after module name in call
to require()

PR-URL: https://github.com/joyent/node/pull/7794
Reviewed-by: Trevor Norris <trev.norris@gmail.com>
Reviewed-by: Fedor Indutny <fedor@indutny.com>
Reviewed-by: Timothy J Fontaine <tjfontaine@gmail.com>