mod_firewall: Load a script completely or not at all Previously it was possible that some chains would load, but others would not. This can be surprising (that a "half-loaded" state is possible) and hard to debug. This change makes it so that if some chains don't compile, the whole script will be treated as not loaded.

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summary: Log a message once per minute
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This module sends `-- MARK --` to the log once per minute. This may be
useful to give a sense of how busy the server is or see that logging and
timers are still working.