Merge branch 'maint-0.4.0' into maint-0.4.1

diff --cc .travis.yml
index 7347ae5dfede8133bd6ea1955e9846342d5d2ccb,0eeaecdae3959114e32e2ec59793932a3af3dbbf..a3b17fed7e6b0738a20e1f1e3b665df5f7d48a9d
--- 1/.travis.yml
--- 2/.travis.yml
+++ b/.travis.yml
@@@ -45,8 -45,16 +45,16 @@@ matrix
        compiler: clang
      ## We run chutney on Linux, because it's faster than chutney on macOS
      - env: CHUTNEY="yes" CHUTNEY_ALLOW_FAILURES="2" SKIP_MAKE_CHECK="yes"
+       ## (Linux only) Use an older Linux image (Ubuntu Trusty)
+       ## The Xenial and Bionic images cause permissions issues for chutney,
+       ## this is a workaround, until we fix #32240.
+       dist: trusty
+     ## We check asciidoc with distcheck, to make sure we remove doc products
+     ## We use Linux clang, because there are no other Linux clang jobs
+     - env: DISTCHECK="yes" ASCIIDOC_OPTIONS="" SKIP_MAKE_CHECK="yes"
+       compiler: clang
      ## We include a single coverage build with the best options for coverage
 -    - env: COVERAGE_OPTIONS="--enable-coverage" HARDENING_OPTIONS=""
 +    - env: COVERAGE_OPTIONS="--enable-coverage" HARDENING_OPTIONS="" TOR_TEST_RNG_SEED="636f766572616765"
      ## We run rust on Linux, because it's faster than rust on macOS
      ## We check rust offline
      - env: RUST_OPTIONS="--enable-rust" TOR_RUST_DEPENDENCIES=true