Log Message:
Update to 3.36

* Require devel/nspr-4.19

Changelog:
The NSS team has released Network Security Services (NSS) 3.36,
which is a minor release.

Summary of the major changes included in this release:
- Replaced existing vectorized ChaCha20 code with verified
  HACL* implementation.
- Experimental APIs for TLS session cache handling.