(using "make man-html").
Add HTML version of lsdistcc man page to index.html.

The HTML files were generated automatically using

  sudo apt-get install troffcvt
  make man-html

But I have also changed the man source files to ensure that
the generated output still looks nice.  The changes were
mainly replacing blank lines with ".PP", but there were a
few other tweaks needed too.

Tested by viewing the output on both Chrome and Safari,
and using "man" and (equivalently) "nroff -man" and
examining the changes.

Reviewed by Craig Silverstein.

- Create an index.html in doc/web/man to make the
  presentation of that page prettier.
  Previously it was a rather ugly directory listing
  of file names like "distcc_1.html", "distccd_1.html", etc.
- Add links to the INSTALL file and README* files
  from that doc/web/man/index.html page.

Reviewed by Craig Silverstein.

This patch adds documentation of all of the exit codes to the man page.

Also add comment to exitcode.h reminding maintainers to update the man page.

Also update the HTML versions of the man pages.

Just various relatively minor suggestions.  I didn't understand the remarks
about the importance of having 'beefier' remote machines (their raw CPU power
are not different although RAM and number of CPUs per machine differ), so I took
them out.  Instead, a made a separate point about what would have happened if
we'd used multiple-CPU clients.  I put in a reference to our gws:gws benchmark,
which drove our work.

Also,

-- Add side point about possible configurations issues and link to man pages.

-- The number 'four' (for # of hello compilations) was obtained by inspection of
   the distcc log.


Review: csilvers and fergus (at Google).

Add include_server, which is a new man page.  Update the Makefile to
know about the new man page, include it in the distribution, etc.
Also update the rpm spec to include it too.