external/conscrypt: allow server-initiated renegotiations.
Adam Langley authored
BoringSSL disables server-initiated renegotiations by default. However,
it's unclear what the impact of this will be. On the other hand,
rejecting renegotiations certainly makes things simplier.

(cherry picked from commit ed628f94)

Bug: 23189319
Change-Id: I0cd3f04838c0afea665a88d4f0cd0a16c1e811de
295b30e7