core: use rtimer instead of qtimer for everything #48027
Merged
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The max number of allowed RTimers is configured at start time, so this number needs to be adjusted in proxy & handler to cover any new usages. Currently, RTimer usage is per-session, with a limit of 10 per session (an overestimate). This PR adds an extra 100 miscellaneous timers to cover per-thread timers such as the ones in StatsManager, the default ZhttpManager, and various QZmqSockets.
For the proxy, it also adds 10 per "zroute" (a route with a zhttp target), since each zroute contains a ZhttpManager which contains timers. This required introducing a zroutes maximum. Routes with zhttp targets are likely not used much by anyone, and having a lot of them would be even more unusual, so the max is hardcoded rather than configurable.