master: Update goal restrictions in the example mfsexports.cfg

This commit updates informations about goal restriction which are
included in the example of the mfsexports.cfg file installed in
/etc/mfs/mfsexports.cfg.dist.

Change-Id: I35fd79e4ea5e047c4a12530a70d69818dee34f23
cgi: Fix printing goal limitations

In the CGI interface there is a possibility to see goal restriction in
two tabs: Exports and Mounts. These restrictions were not printed if the
maximum goal is >= 9. This is no longer the right condition, so this
commit changes it to >= 20.

Change-Id: I427862b3838955ca9d3bd11e7be6936ef9e702b4
mount: Fix printing session limitations after mounting

This commit fixes a message that is being printed after LizardFS is
successfully mounted. The message has a form of:

  mfsmaster accepted connection with parameters: read-write,restricted_ip,map_all ; root mapped to root:root ; users mapped to user:group ; setgoal limited to (2:8)

Due to an error in parsing a message from mfsmaster, the informations
about mapped users, goal or trashtime restrictions were incorrect. This
commit fixes the issue, so the mechanism should work OK now.

This commit also adds a dissection information for the
MATOCL_FUSE_REGISTER message (the one that was faultily parsed by
mount) to the Wireshark plugin.

Change-Id: I22dfabd5d8ba9bbf348e9c3c1d86cfa05de787bf