trace-cmd: Prevent latency tracer plugins from doing network tracing

The latency tracer plugins do not support network tracing. It crashes
when an attempt to do a latency tracer plugin with the -N option.

Simply prevent trace-cmd from performing a network trace with one
of the latency tracer plugins and update the man pages.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2 files changed