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Bram Matthys
98db288079
In the IRCd world correct time is very important. This means that time should be correct when the IRCd is booted, either by running ntpd/ntpdate on the system or some other synchronization software, or by using the built-in timesync feature. Whenever the clock is adjusted for more than a few seconds AFTER the IRCd has booted, it can lead to dangerous effects ranging from unfair timestamps for nicks and channels (and hence the possibility to takeover channels), to even completely stalling the IRCd (negative timeshift) or making it so nobody can connect anymore due to throttling (positive timeshift). We now try to 'fix' the worst effects such as the IRCd freeze and throttling. This does not fix the whole problem, so I've added some big warnings when the clock is adjusted, including an annoying one every 5 minutes if the clock was set backwards, until the time is OK again (catches up with the original time). This fixes #0003230 reported by Stealth, and #0002521 reported by durrie.