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Update to v1.4.6

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- update to 1.4.5:
  * Another small bug fix release backporting https://github.com/
    libbpf/libbpf/commit/d9f9fd5b22223ae69c62e083da6093d95a0db799
    which works around kernel-side bug with USDT PID filtering on
    kernels that support multi-uprobe (but have broken PID
    filtering).

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Update to 1.4.3: fix libbpf unintentionally dropping FD_CLOEXEC flag when (internally)
    duping FDs

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Update to v1.4.2

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Update to v1.4.1

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Update to 1.4.0

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- update to 1.3.0:
  * support for `netfilter` programs is added
    `SEC("netfilter")` is now available
  * API function `bpf_program__attach_netfilter()` is now
    available
  * support for `tcx` BPF programs is added:
  * the following new SEC definitions are now available:
    SEC("tc/egress"), SEC("tc/ingress"), SEC("tcx/egress"),
    SEC("tcx/ingress")
  * the following SEC definitions are now considered legacy:
    SEC("tc"), SEC("action"), SEC("classifier")
  * functions `bpf_prog_attach_opts()` and
    `bpf_prog_query_opts()` are extended to work with `tcx`
    programs, plus two new API functions are added:
  * the following new SEC definitions are now available:
    SEC("uprobe.multi"), SEC("uprobe.multi.s"),
    SEC("uretprobe.multi"), SEC("uretprobe.multi.s")
  * support for section `SEC("usdt.s")` is added for sleepable
    `usdt` programs;
  * support for Unix domain socket cgroup BPF programs is added
    the following new SEC definitions are now available:
     SEC("cgroup/connect_unix"),SEC("cgroup/sendmsg_unix"),
     SEC("cgroup/recvmsg_unix"), SEC("cgroup/getpeername_unix"),
     SEC("cgroup/getsockname_unix")
  * new `LIBBPF_OPTS_RESET()` utility macro;
  * new `bpf_object__unpin()` function to complement existing
    `bpf_object__pin()`;
  * new API functions for work with ring buffers
  * uprobe SEC matcher extended to allow golang symbols;
  * uprobe support for symbols versioning;

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- update to v1.2.2:
  * fix a regression in perf tool caused by libbpf resetting its custom
    catch-all SEC() handler on explicit bpf_program__set_type() call
  * fix possible double-free in USDT-related libbpf code, which happens when
    libbpf runs out of space in __bpf_usdt_specs map due to having too many
    unique USDT specs

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- update to 1.2.0:
  * completely overhauled "Libbpf overview" landing documentation
    page;
  * support for BPF link-based `struct_ops` programs:
      * `SEC(".struct_ops.link")` annotations;
      * `bpf_map__attach_struct_ops()` attach API;
      * `bpf_link__update_map()` link update API;
  * support sleepable `SEC("struct_ops.s")` programs
  * improved thread-safety of libbpf print callbacks and
    `libbpf_set_print()`
  * improve handling and reporting of missing BPF kfuncs
  * `bpf_{btf,link,map,prog}_get_info_by_fd()` APIs
  * `bpf_xdp_query_opts()` supports fetching XDP/XSK supported
     features;
  * `perf_buffer__new()` allows customizing notification/sampling
    period now;
  * BPF verifier logging improvements:
    * pass-through BPF verifier log level and flags to kernel as
      is
     * support `log_true_size` for getting required log buffer size
       to fit BPF verifier log completely;
     * allow precise control over kprobe/uprobe attach mode: legacy,
       perf-based, link-based.
  * fix legacy kprobe events names sanitization;
  * fix clobbering errno in some cases;
  * fix BPF map's `BPF_F_MMAPABLE` flag sanitization;
  * fix BPF-side USDT support code on s390x architecture;
  * fix `BPF_PROBE_READ{_STR}_INTO()` on s390x architecture;
  * fix kernel version setting for Debian kernels;
  * fix netlink protocol handling in some cases;

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Remove requirement of linux-glibc-devel >= 5.16 for devel package

They're no longer needed since libbpf v0.7, which includes commit 8404d1396c "libbpf: Define BTF_KIND_* constants in btf.h to avoid compilation errors" that defines the constants that used to be missing.

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