Merge branch 'ps/meson-contrib-bits'

Update meson-based build procedure to cover contrib/ and other places as well. * ps/meson-contrib-bits: ci: exercise credential helpers ci: fix propagating UTF-8 test locale in musl-based Meson job meson: wire up static analysis via Coccinelle meson: wire up git-contacts(1) meson: wire up credential helpers contrib/credential: fix compilation of "osxkeychain" helper contrib/credential: fix compiling "libsecret" helper contrib/credential: fix compilation of wincred helper with MSVC contrib/credential: fix "netrc" tests with out-of-tree builds GIT-BUILD-OPTIONS: propagate project's source directory