Disable PAX mprotect to make just-in-time-compile tests work again.

Ok: Christos Zoulas

Add t_extmem test.

Add t_cop test.

libarch on sparc isn't -l${MACHINE_CPU}. Don't link to it.

Link with -l${MACHINE_CPU}.

branches: 1.1.2; 1.1.4; 1.1.10;
Add libbpfjit test.

avoid uninitialised variable.

found by GCC 12.

Add two more libbpfjit_jmp_jeq_x_noinit_XX tests.

Replace accidentally committed test with libbpfjit_jmp_jeq_x_noinit_ax test.

Improve libbpfjit_jmp_jeq_x test.

Add libbpfjit_jmp_ja_overflow test.

Add libbpfjit_jmp_ja_invalid test.

Add libbpfjit_ret_k and libbpfjit_bad_ret_k tests.

Add BPF_MOD tests. Plus one tiny change.

Add BPF_XOR tests.

Rename bpfjit tests to libbpfjit, don't test zero buflen and a couple of
cosmetic changes.

Implement copfuncs and external memory in bpfjit.

Update copyright year.

Test Array Bounds Check Elimination (ABC) and test bpf programs from bpf(4).

branches: 1.2.2;
- Add bpf_args_t and convert bpf_filter_ext() to use it. This allows the
caller to initialise (and re-use) the memory store.
- Add bpf_jit_generate() and bpf_jit_freecode() wrappers.

branches: 1.1.2; 1.1.4;
Add libbpfjit test.

branches: 1.4.2; 1.4.6;
Add bpfjit_cop_copx and bpfjit_copx_cop tests.

Rename bpfjit tests to libbpfjit.

Fix copyright. These tests are based on tests created in 2013 on github.com.

https://github.com/alnsn/bpfjit , files test/test_cop{,x}.c.

Add BPF_COP and BPF_COPX tests.

branches: 1.3.2; 1.3.6;
Add a link to ../../net/bpfjit/t_extmem.c.

Rename bpfjit tests to libbpfjit.

Add external memory tests.