like Malloc, Realloc and especially Free conflict with already existing names
on some operating systems or other packages. That is reason enough to change
the names of the OpenSSL memory allocation macros to something that has a
better chance of being unique, like prepending them with OPENSSL_.
This change includes all the name changes needed throughout all C files.
PS: Feel free to move the IMPLEMENT_STACK_OF(X509_INFO) from
crypto/asn1/x_info.c to any other place where you think it fits better.
X509_INFO is a structure slightly spreaded over ASN.1, X509 and PEM code,
so I found no definitive location for IMPLEMENT_STACK_OF(X509_INFO). In
crypto/asn1/x_info.c it's at least now bundled with X509_INFO_new() and
friends.
