tls: enable renegotiation when using boringssl
This enables TLS renegotiation when building Node with BoringSSL, which matches OpenSSL's default behavior.
No effect when building against OpenSSL.
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines