Document --ignore-soft-errors in the gnt-node man page
Document --ignore-soft-errors in the gnt-node man page

The net effect of this option is that the allocator is called
with this additional command-line option.

Signed-off-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>
Reviewed-by: Petr Pudlak <9d19625f8ee825a2c398462ed335cbcf98f79c32@google.com>

leshchevds/ganeti,bitemyapp/ganeti,grnet/snf-ganeti,leshchevds/ganeti,leshchevds/ganeti,grnet/snf-ganeti,bitemyapp/ganeti,onponomarev/ganeti,andir/ganeti,yiannist/ganeti,yiannist/ganeti,onponomarev/ganeti,dimara/ganeti,yiannist/ganeti,andir/ganeti,ganeti/ganeti,mbakke/ganeti,mbakke/ganeti,andir/ganeti,ganeti/ganeti,mbakke/ganeti,dimara/ganeti,ganeti/ganeti