NSS:
* test NSS-specific code with -std=gnu99
* use a recent gcc version from the latest Ubuntu image
Chutney:
* use clang, so we keep one clang Linux job
* keep clang on a fast job, so the overall build finishes quickly
Closes ticket 32500 for 0.3.5.
Require C99 standards-conforming code in Travis CI, but allow GNU gcc
extensions. Also activates clang's -Wtypedef-redefinition warnings.
Builds some jobs with -std=gnu99, and some jobs without.
Closes ticket 32500.
Bionic has a recent coccinelle version, which passes our CI tests.
But Bionic (and Xenial) cause permissions errors for chutney.
We'll fix those in 32240.
Part of 31919.
Merge master's RUST_VERSION="nightly" into the macOS Rust job
from bug31859_041.
Drop master's RUST_VERSION="beta", because we only have two
Rust jobs now.
Since Rust on macOS is slow, don't wait for the macOS Rust job to finish.
Instead, split rust into slow rust (macOS) and fast rust (Linux). And
allow the build to finish before slow rust finishes.
Also make sure that we have:
* a Rust build on each platform,
* a Rust build with each compiler, and
* a check on all our Rust builds.
Finally, sort builds: allow fail last, macOS first, slowest first.
Closes 31859 for 0.3.5.
Since Travis macOS has IPv6 support (and Travis Linux does not), chutney
will now run its IPv6 networks as part of Travis CI.
But since chutney is slow, don't wait for the macOS chutney to finish.
(Travis have fixed the duplicate notification bug in fast_finish. So we
can use fast_finish and allow_failure to finish early. Unfortunately,
allow_failure also means we ignore failures in macOS chutney.)
Also make sure that we have:
* a compile on each platform, with each compiler,
* a check on each platform, and
* a check on each compiler.
Finally, sort builds: allow fail last, macOS first, slowest first.
Closes ticket 30860.
Closes ticket 31859 for 0.2.9.
