linux-wandboard

nfsd: fix /proc/net/rpc/nfsd.export/content display

Note with "first" always 0, and "lastflags" initially 0, we always dump
a spurious set of 0 flags at the start, among other problems.

Fix.  And attempt to make the code a little more obvious.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>