Symptoms:
```
extras/dialer/time-scope-probe-cgroup:31:18: arithmetic expressions must consist of names and numbers
extras/dialer/time-scope-probe-cgroup: run shfmt -i 4 -w extras/dialer/time-scope-probe-cgroup
extras/dialer/time-scope-probe-proc:28:18: arithmetic expressions must consist of names and numbers
extras/dialer/time-scope-probe-proc: run shfmt -i 4 -w extras/dialer/time-scope-probe-proc
extras/in_parallel.sh:29:16: arithmetic expressions must consist of names and numbers
extras/in_parallel.sh: run shfmt -i 4 -w extras/in_parallel.sh
```
Visible on https://circleci.com/gh/kinvolk/scope/980
Since https://github.com/weaveworks/tcptracer-bpf/pull/39, tcptracer-bpf
can generate "fd_install" events when a process installs a new file
descriptor in its fd table. Those events must be requested explicitely
on a per-pid basis with tracer.AddFdInstallWatcher(pid).
This is useful to know about "accept" events that would otherwise be
missed because kretprobes are not triggered for functions that were
called before the installation of the kretprobe.
This patch find all the processes that are currently blocked on an
accept() syscall during the EbpfTracker initialization.
feedInitialConnections() will use tracer.AddFdInstallWatcher() to
subscribe to fd_install events. When a fd_install event is received,
synthesise an accept event with the connection tuple and the network
namespace (from /proc).
There is nothing special about the "default" namespace, and selecting
it by default means we only show a partial view of the system, which
is hard to spot, especially for novice users.
* Added a zoom slider control in the bottom-right corner.
* Made the control vertical and added the buttons.
* Adjusted the styles and borders.
* Trying to fix Webpack
* Hide zoom control when there is no content.
* Polished the code.
This should never have been added. The IsNamespace filter will always return false for these nodes.
It isn't even clear what this filter would mean, even if implemented, since those nodes don't map to a single
container and therefore not to a single namespace.
