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6a92b14cc1
An eb tree was used to anticipate for infinite amount of custom log steps configured at a proxy level. In turns out this makes no sense to configure that much logging steps for a proxy, and the cost of the eb tree is non negligible in terms of memory footprint, especially when used in a default section. Instead, let's use a simple bitmask, which allows up to 64 logging steps configured at proxy level. If we lack space some day (and need more than 64 logging steps to be configured), we could simply modify "struct log_steps" to spread the bitmask over multiple 64bits integers, minor some adjustments where the mask is set and checked.