Log Message:
Update navi2ch to 20070114 snapshot.

(Note this is only a snapshot, and the next release will be 1.8.0.  To keep
the order of versions, this package is named 1.7.5.99.20070114.  Thus this
is ever higher than 1.7.5 and lower than 1.8.0.)

Catching up to 2ch infrastructure changes so that fix the problem unable to
post articles.

While here teach emacs22{,nox}.