Updating test-code only; set ReadHeaderTimeout for some, or suppress the linter
error for others.

     contrib/httpserver/server.go:11:12: G114: Use of net/http serve function that has no support for setting timeouts (gosec)
        log.Panic(http.ListenAndServe(":80", nil))
                  ^
     integration/plugin/logging/cmd/close_on_start/main.go:42:12: G112: Potential Slowloris Attack because ReadHeaderTimeout is not configured in the http.Server (gosec)
        server := http.Server{
            Addr:    l.Addr().String(),
            Handler: mux,
        }
     integration/plugin/logging/cmd/discard/main.go:17:12: G112: Potential Slowloris Attack because ReadHeaderTimeout is not configured in the http.Server (gosec)
        server := http.Server{
            Addr:    l.Addr().String(),
            Handler: mux,
        }
     integration/plugin/logging/cmd/dummy/main.go:14:12: G112: Potential Slowloris Attack because ReadHeaderTimeout is not configured in the http.Server (gosec)
        server := http.Server{
            Addr:    l.Addr().String(),
            Handler: http.NewServeMux(),
        }
     integration/plugin/volumes/cmd/dummy/main.go:14:12: G112: Potential Slowloris Attack because ReadHeaderTimeout is not configured in the http.Server (gosec)
        server := http.Server{
            Addr:    l.Addr().String(),
            Handler: http.NewServeMux(),
        }
     testutil/fixtures/plugin/basic/basic.go:25:12: G112: Potential Slowloris Attack because ReadHeaderTimeout is not configured in the http.Server (gosec)
        server := http.Server{
            Addr:    l.Addr().String(),
            Handler: http.NewServeMux(),
        }
     volume/testutils/testutils.go:170:5: G114: Use of net/http serve function that has no support for setting timeouts (gosec)
        go http.Serve(l, mux)
           ^

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

The io/ioutil package has been deprecated in Go 1.16. This commit
replaces the existing io/ioutil functions with their new definitions in
io and os packages.

Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>

Configuration over the API per container is intentionally left out for
the time being, but is supported to configure the default from the
daemon config.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
(cherry picked from commit cbecf48bc352e680a5390a7ca9cff53098cd16d7)
Signed-off-by: Madhu Venugopal <madhu@docker.com>

This supplements any log driver which does not support reads with a
custom read implementation that uses a local file cache.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
(cherry picked from commit d675e2bf2b75865915c7a4552e00802feeb0847f)
Signed-off-by: Madhu Venugopal <madhu@docker.com>

1. Use `go list` to get list of integration dirs to build. This means we
   do not need to have a valid `.go` in every subdirectory and also
   filters out other dirs like "bundles" which may have been created.
2. Add option to specify custom flags for integration and
   integration-cli. This is needed so both suites can be run AND set
   custom flags... since the cli suite does not support standard go
   flags.
3. Add options to skip an entire integration suite.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>

In cases where a logging plugin has crashed when the daemon tries to
copy the container stdio to the logging plugin it returns a broken pipe
error and any log entries that occurr while the plugin is down are lost.

Fix this by opening read+write in the daemon so logs are not lost while
the plugin is down.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>

This ensures that all log plugins are registered when the log validator
is run.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>