[PATCH 7/7] fbset: update manpages

Hi,

And the last one for now, updates to the man pages by:

 Osamu Aoki [off-list ref],
 André Dahlqvist [off-list ref],
 and me.

Kevin Kreamer contributed the modeline2fb manpage.

As fbset can be used by normal users I've moved it from section 8
to 1, but to not make the diff useless I let the move to who commits
this (fbset.8 -> fbset.1).

regards,
guillem