Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

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

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

Add a `fix' for another whitespace bug.

If the sentence starts with a multiple of eight spaces, the sentence
should in almost all practical cases have started with tabs instead.
Replace these spaces by tabs.

Add fixwhite(1).

This small utility can be used to `sanitize' the whitespace in source
code. It does the following things:

Global:
- Remove empty lines at the beginning and the end of a file.
- Merge successive empty lines into a single empty line.

Per-line:
- Remove trailing whitespace.
- Merge spaces preceeding tabs into the tabs.

It operated on stdin/stdout. This means that if you use vi(1), you can
just run :%!fixwhite to reorganize the file.