the initialisation and cleanup of "ex_data" elements to before an init()
handler and after a finish() handler respectively.

At the same time, add VMS support for Rijndael.

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.

with RSA_METHOD (the **_get_default_methods do set the default value if
it's not set). However, the code had some duplication and was a bit
conter-intuitive.

Tidy up CRYPTO_EX_DATA structures.

DSA_METHOD to make it more consistent with RSA_METHOD.

while implementing and using it.

Submitted by:
Reviewed by:
PR:

1. The already released version was 0.9.1c and not 0.9.1b

2. The next release should be 0.9.2 and not 0.9.1d, because
   first the changes are already too large, second we should avoid any more
   0.9.1x confusions and third, the Apache version semantics of
   VERSION.REVISION.PATCHLEVEL for the version string is reasonable (and here
   .2 is already just a patchlevel and not major change).
tVS: ----------------------------------------------------------------------