Merge branch 'ps/reftable-hardening' into next

The reftable code has been hardened against corrupted tables by fixing out-of-bounds writes, out-of-bounds reads, and abort calls during parsing. * ps/reftable-hardening: reftable/table: fix OOB read on truncated table reftable/table: fix NULL pointer access when seeking to bogus offsets reftable/block: fix OOB read with bogus restart offset reftable/block: fix use of uninitialized memory when binsearch fails reftable/block: fix OOB read with bogus restart count reftable/block: fix OOB read with bogus block size reftable/block: fix OOB write with bogus inflated log size t/unit-tests: introduce test helper to write reftable blocks reftable/record: don't abort when decoding invalid ref value type reftable/basics: fix OOB read on binary search of empty range oss-fuzz: add fuzzer for parsing reftables meson: support building fuzzers with libFuzzer