When creating TLSSocket on top of the regular socket that already
contains some received data, `_tls_wrap.js` should try to write all that
data to the internal `SSL*` instance.
fix#6940
NOTE: Also removed `.receivedShutdown` method of `Connection` it wasn't
documented anywhere, and was rewritten with `true` after receiving
`close_notify`.
fix#6638
Update the tls and https tests to explicitly set rejectUnauthorized instead of
relying on the NODE_TLS_REJECT_UNAUTHORIZED environment variable getting set.
This commit changes the default value of the rejectUnauthorized option from
false to true.
What that means is that tls.connect(), https.get() and https.request() will
reject invalid server certificates from now on, including self-signed
certificates.
There is an escape hatch: if you set the NODE_TLS_REJECT_UNAUTHORIZED
environment variable to the literal string "0", node.js reverts to its
old behavior.
Fixes#3949