Miroslav Lichvar d0b2486036 client: don't call select() with invalid timeout ...

If the system clock was stepped forward after chronyc sent a request and
before it read the clock in order to calculate the receive timeout,
select() could be called with a negative timeout, which resulted in an
infinite loop waiting for select() to succeed.

Fix the submit_request() function to not call select() with a negative
timeout. Also, return immediately on any error of select().

2017-12-05 12:13:37 +01:00

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