flowtop: Add process UI tab entry
Add process UI tab entry to show flows statistics per pid.
Also changed flow_entry which now has pointer to new struct proc_entry
object which contains process related info.
On each 1 second refresh proc_entry is checked if it exists by checking
/proc/<pid> path, and is deleted if there is no any flows related to it
(flows_count is 0), if the process exists then dst & src rates info is
zeroed and summed from the all related flows which are in the
proc_entry->flows list.
The bytes & pkts amount info is collected during all the time process
exists.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>