[PROJ] Motion: approve RFC3 update, and bump to C++17 for PROJ 9.6

[Howard Butler]

+1 Howard

> On Jan 6, 2025, at 10:07 AM, Charles Karney via PROJ <proj at lists.osgeo.org> wrote:
> 
> +1 Charles
> 
> C++17 features that might be useful:
>  if constexpr
>  std::hypot(x, y, z)
>  std::clamp(x, lo, hi)
> 
> On 1/6/25 10:59 AM, Even Rouault via PROJ wrote:
>> Hi,
>> Motion adopt https://github.com/OSGeo/PROJ/pull/4369 changes to RFC-3 to relax it to allow updating programming language standard in minor versions, and update build requirements for PROJ 9.6 to be C++17.
>> +1
>> Even
> 
> -- 
> Charles Karney <karney at alum.mit.edu>
> 702 Prospect Ave
> Princeton, NJ 08540-4037
> 
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