core: Increase server handshake timeout to 120s #3799
Merged
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Previously it was 20s. 20s isn't bad, but may be too aggressive.
Having it longer doesn't hurt us too much; we just need some bound.
Since the MAX_BACKOFF on client-side is 120s, this will have client and
server match, except for jitter. Although I will note that the
client-side value covers more work than the server-side, such as
attempting to connect to multiple hosts.