util/fix-deprecation: DEPRECATEDIN conversion util for public headers

util/fix-deprecation: DEPRECATEDIN conversion util for public headers

Use this for quick and easy conversion of old-style to new-style deprecation:

    perl util/fix-deprecation \
         < include/openssl/rsa.h > include/openssl/rsa.h.new
    mv include/openssl/rsa.h.new include/openssl/rsa.h

This is not a perfect utility, but it does the job.  It doesn't try to
re-indent, that's left for manual post processing.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13239)