Merge branch 'master' into new-cli

doc/manual/command-ref/env-common.xml

doc/manual/command-ref/nix-shell.xml

doc/manual/expressions/builtins.xml

doc/manual/expressions/derivations.xml

doc/manual/expressions/language-values.xml

doc/manual/introduction/about-nix.xml

doc/manual/release-notes/rl-1.11.xml

perl/lib/Nix/Store.xs

release.nix

scripts/install-nix-from-closure.sh

scripts/nix-profile.sh.in

scripts/nix-push.in

src/libexpr/eval.cc

src/libexpr/eval.hh

src/libexpr/get-drvs.cc

src/libexpr/get-drvs.hh

src/libexpr/json-to-value.cc

src/libexpr/lexer.l

src/libexpr/nixexpr.cc

src/libexpr/nixexpr.hh