MFC r269502: Fix an overflow in getsockopt(). optval isn't big enough to hold sbintime_t. Re-introduce r255030 behaviour capping socket timeouts to INT_32 if they're too large.
MFC r269502:
Fix an overflow in getsockopt(). optval isn't big enough to hold
sbintime_t.
Re-introduce r255030 behaviour capping socket timeouts to INT_32
if they're too large.

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