Merge branch 'document-store-options' of https://github.com/tweag/nix

src/libexpr/flake/lockfile.hh

src/libfetchers/fetchers.hh

src/libstore/binary-cache-store.cc

src/libstore/binary-cache-store.hh

src/libstore/build.cc

src/libstore/dummy-store.cc

src/libstore/globals.cc

src/libstore/globals.hh

src/libstore/http-binary-cache-store.cc

src/libstore/legacy-ssh-store.cc

src/libstore/local-binary-cache-store.cc

src/libstore/local-store.cc

src/libstore/local-store.hh

src/libstore/remote-store.cc

src/libstore/remote-store.hh

src/libstore/s3-binary-cache-store.cc

src/libstore/ssh-store.cc

src/libstore/store-api.cc

src/libstore/store-api.hh

src/libutil/abstractsettingtojson.hh