Changes:

• JobMonitorFileshareProcess replaced with NetlinkProcessMonitor - based on netlink Process Events Connector API:
  • monitor listens for EXIT and EXEC events from the kernel
  • EXEC event handler verifies that the process created is a fileshare process by getting PID from the event and reading /proc VFS to check the process path
  • if it's confirmed that the created process is a fileshare process, then we save its PID and allow fileshare port
  • on EXIT, we compare the PID and if it does match then we are blocking fileshare because it means that fileshare process exited - no matter how (was killed or stopped)
• the monitor is enabled only when meshnet is on