Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

This commit was generated by cvs2svn to compensate for changes in r146515,
which included commits to RCS files with non-trunk default branches.

Import of stripped down GNU texinfo 4.8

Import of stripped down GNU texinfo 4.6

Import of stripped down GNU texinfo 4.5

Virgin import of GNU texinfo 4.0