[Proj] Using proj_api.h in older versions

[José Luis García Pallero]

Hello:

I've read in NEWS file of 4.8.0 version that now proj_api.h file
should be used instead projects.h. In older versions, can be used
proj_api.h instead of projects.h too?

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José Luis García Pallero
jgpallero at gmail.com
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Use Debian GNU/Linux and enjoy!
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