Make HashMap fall back to RtlGenRandom if BCryptGenRandom fails

Issue #84096 changed the hashmap RNG to use BCryptGenRandom instead of
RtlGenRandom on Windows.

Mozilla Firefox started experiencing random failures in
env_logger::Builder::new() (Issue #94098) during initialization of their
unsandboxed main process with an "Access Denied" error message from
BCryptGenRandom(), which is used by the HashMap contained in
env_logger::Builder

The root cause appears to be a virus scanner or other software interfering
with BCrypt DLLs loading.

This change adds a fallback option if BCryptGenRandom is unusable for
whatever reason. It will fallback to RtlGenRandom in this case.

Fixes #94098

0 files changed, 0 insertions, 0 deletions