#117 areafix doesn't check link's read/write level

[Markus Reschke]

Write/read levels aren't checked when a link subscribes echos, i.e. he can subscribe any echo matching his group settings.

Fix:

In file fidoconf/src/afixcmd.c in function subscribeCheck() insert after
} else found = 1;

if ((area->levelwrite > link->level) && (area->levelread > link->level))
found = 0;

[Markus Reschke]

This fix also prevents the listing of echos the link don't got any read/write access to.