[PATCH] review neon build macro

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The --with-neon option of the subversion configure script needed a help
message that was more clear. Also, I found that the neon configuration
was quite strange and produced non-standard output, so I fixed that, too.

I left a subsection's indentation the way it was because indenting it
correctly made the diff unreadable. It's a whole if body indented 2
characters too many, so it doesn't make the code confusing to leave it
that way.

I have verified that this patch works and gives improved output for
pretty much every possible case, on both Linux and FreeBSD.

[[[
* build/ac-macros/neon.m4: improved help message,
   removed an impossible condition that checked if a
   file known to exist has an empty path, clarified
   and streamlined the output messages.
]]]

- --
Neels Janosch Hofmeyr
Software Developer

neels_at_elego.de
Public Key: http://binarchy.net/neels/neels.hofmeyr.public.key.asc

elego Software Solutions GmbH http://www.elegosoft.com
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13355 Berlin, Germany Amtsgericht Charlottenburg
Tel.: +49 30 23 45 86 96 Sitz der Gesellschaft: Berlin
Fax: +49 30 23 45 86 95 Geschäftsführer: Olaf Wagner

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