Implement RAII for PreservationTable

[JosiahWI]

This is pretty straightforward, but the catch is what to do if there are unreleased evacuation blocks at destruction. I still need to write code to handle printing a warning or something to that effect before this is fully ready.

[JosiahWI]

The AuTest bad chunked encoding failed.

     file /tmp/sandbox/bad_chunked_encoding/_output/bad_chunked_encoding-verifier-server2/stream.stdout.txt : Verify that the body never got through. - Failed
        Reason: Contents of /tmp/sandbox/bad_chunked_encoding/_output/bad_chunked_encoding-verifier-server2/stream.stdout.txt contains expression: "abc"
           Details:
             Via: http/1.1 traffic_server[ed350727-0c1d-4e42-9a5d-aeca5abc9853] (ApacheTrafficServer/10.1.0) : 17
             Via: http/1.1 traffic_server[ed350727-0c1d-4e42-9a5d-aeca5abc9853] (ApacheTrafficServer/10.1.0) : 35
             Via: http/1.1 traffic_server[ed350727-0c1d-4e42-9a5d-aeca5abc9853] (ApacheTrafficServer/10.1.0) : 53
             Via: http/1.1 traffic_server[ed350727-0c1d-4e42-9a5d-aeca5abc9853] (ApacheTrafficServer/10.1.0) : 71
             Via: http/1.1 traffic_server[ed350727-0c1d-4e42-9a5d-aeca5abc9853] (ApacheTrafficServer/10.1.0) : 95
             Via: http/1.1 traffic_server[ed350727-0c1d-4e42-9a5d-aeca5abc9853] (ApacheTrafficServer/10.1.0) : 119

[JosiahWI]

Not rerunning CI since this is a draft and I already got enough confidence that AuTest found no problems with it.

[JosiahWI]

The last test run of the AuTest remap_acl failed.

[moonchen]

Nice.