modules/{http,watchdog}: fix stability problems

As first noted in commit d1a229ae, in some cases we do call chains that are not supported for JIT in LuaJIT.

I'm not 100% sure all of these are needed to comply, but the functions here are really small and probably not to be that heavily used, so I don't think it will be costly to interpret them (and avoiding crashes is more important).

In my tests this fixed occasional crashes when using http://*/trace/*

changed milestone to %5.3.0

added bug label

This time I checked all trace_log_f and trace_callback_f occurrences.

changed the description

added 3 commits

• dc225c71...fdb3d720 - 2 commits from branch master
• c0767654 - modules/{http,watchdog}: fix stability problems

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approved this merge request

mentioned in commit babc4033

merged