Merge branch 'ticket32177_041' into ticket32177_042

Merge RUST_VERSION from maint-0.4.2 into disabled macOS rust build
from ticket32177_041.

diff --cc .travis.yml
index c65923d2c4809f16bbdb666ec8a43185b78c109d,221fab71c65f578049e5b8d05e6f58c89cd586c6..f9f13c8569bea8cefbec513791546f8e175a1e91
--- 1/.travis.yml
--- 2/.travis.yml
+++ b/.travis.yml
@@@ -57,12 -53,14 +57,14 @@@ matrix
      ## We check disable module dirauth
      - env: MODULES_OPTIONS="--disable-module-dirauth"
      ## We run rust on macOS, because we have seen macOS rust failures before
-     - env: RUST_VERSION="nightly" RUST_OPTIONS="--enable-rust --enable-cargo-online-mode"
-       compiler: clang
-       os: osx
+     # Disabled due to slow Travis macOS builds, see #32177
 -    #- env: RUST_OPTIONS="--enable-rust --enable-cargo-online-mode"
++    #- env: RUST_VERSION="nightly" RUST_OPTIONS="--enable-rust --enable-cargo-online-mode"
+     #  compiler: clang
+     #  os: osx
      ## We run chutney on macOS, because macOS Travis has IPv6
-     - env: CHUTNEY="yes" CHUTNEY_ALLOW_FAILURES="2" SKIP_MAKE_CHECK="yes"
-       os: osx
+     # Disabled due to slow Travis macOS builds, see #32177
+     #- env: CHUTNEY="yes" CHUTNEY_ALLOW_FAILURES="2" SKIP_MAKE_CHECK="yes"
+     #  os: osx
      ## We clone our stem repo and run `make test-stem`
      - env: TEST_STEM="yes" SKIP_MAKE_CHECK="yes"