Misc fixes.

Userspace app:
- Updated the man page.
- Fixed the output of --help. It was kinda wobbly.
- Added --maxStoredPkts to --help and to --general --display.
- The session state is now printed on the TCP table.

Kernel module:
- Removed L4PROTO_NONE because it was only good for fragmentation purposes.
- Added the explicit 4/6 defrag dependency.