v2.40
tests: update build tests
tests: (test_mkfds::sockdiag) new factory
tests: (lsfd) skip some cases if NETLINK_SOCK_DIAG for AF_UNIX is not available
tests: make compatible with autotools
tests,autotools: add TESTS_COMPONENTS macro for specfying test components from make cmdline
Documentation: add basic smoketest for boilerplate.c
tests: fix capability testing
tests: (run.sh) detect builddir from working directory