[bug-gs] 8.12: a number of minor issues

[der Mouse]

I found what looks to me like a bug with ghostscript 6.0.  Before
reporting it, I went to check for a newer version and found 8.12, which
I picked up and installed.

The install went relatively smoothly, mostly.  I ran into a snag with
genarch, got large numbers of compiler warnings, and found a number of
minor glitches in the doc files, but it was otherwise fine.

The main reason I'm sending this rather than a filled-out bug report
form is that it's not clear whether it's better to send multiple
reports, one for each minor issue, or one omnibus report that covers
them all.  I can see arguments either way - or even for a split, such
as one report for all the doc file items and others individually for
the others.

Most briefly, the problems, in case they affect the answer:

- The genarch issue is that clock_t is unsigned and t_eps ended up with
  a very large value - the negative of some small value, maybe -1 (I
  didn't look closely enough to be sure).  Slightly more defensive code
  dealt with this.

- There are several small glitches in the doc files, ranging from typos
  to minor factual errors to things that aren't mentioned that I think
  maybe should be.

- One thing which the building document seems to imply should work
  didn't work for me (trying to turn on rasterop support).

- NetBSD's make(1) has a bug (well, it's deliberate, so I suppose it
  should properly be called a misfeature, even though it's misleadingly
  undocumented) which makes it significantly harder to work with
  ghostscript; it might be good to warn about it in an OS-specific
  section of the Make document.

The problem I thought I saw with 6.0 is not present in 8.12, but upon
looking more closely I'm not entirely convinced it was present in 6.0.

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